diff --git a/src/commands/fun/eco.ts b/src/commands/fun/eco.ts
index 5be316f..557b2aa 100644
--- a/src/commands/fun/eco.ts
+++ b/src/commands/fun/eco.ts
@@ -3,6 +3,7 @@ import {isAuthorized, getMoneyEmbed} from "./subcommands/eco-utils";
 import {DailyCommand, PayCommand, GuildCommand, LeaderboardCommand} from "./subcommands/eco-core";
 import {BuyCommand, ShopCommand} from "./subcommands/eco-shop";
 import {MondayCommand} from "./subcommands/eco-extras";
+import {BetCommand} from "./subcommands/eco-bet";
 
 export default new Command({
     description: "Economy command for Monika.",
@@ -16,7 +17,8 @@ export default new Command({
         leaderboard: LeaderboardCommand,
         buy: BuyCommand,
         shop: ShopCommand,
-        monday: MondayCommand
+        monday: MondayCommand,
+        bet: BetCommand
     },
     user: new Command({
         description: "See how much money someone else has by using their user ID or pinging them.",
diff --git a/src/commands/fun/subcommands/eco-bet.ts b/src/commands/fun/subcommands/eco-bet.ts
new file mode 100644
index 0000000..01c6c96
--- /dev/null
+++ b/src/commands/fun/subcommands/eco-bet.ts
@@ -0,0 +1,190 @@
+import Command from "../../../core/command";
+import $ from "../../../core/lib";
+import {Storage} from "../../../core/structures";
+import {isAuthorized, getMoneyEmbed, getSendEmbed, ECO_EMBED_COLOR} from "./eco-utils";
+import {User} from "discord.js";
+
+export const BetCommand = new Command({
+    description: "Bet your Mons with other people.",
+    usage: "<user> <amount> <duration>",
+    run: "Who are you betting with?",
+    user: new Command({
+        description: "User to bet with.",
+        // handles missing amount argument
+        async run({args, author, channel, guild}): Promise<any> {
+            if (isAuthorized(guild, channel)) {
+                const target = args[0];
+
+                // handle invalid target
+                if (target.id == author.id)
+                    return channel.send("You can't bet Mons with yourself!");
+                else if (target.bot && process.argv[2] !== "dev")
+                    return channel.send("You can't bet Mons with a bot!");
+
+                return channel.send("How much are you betting?");
+            }
+        },
+        number: new Command({
+            description: "Amount of Mons to bet.",
+            // handles missing duration argument
+            async run({args, author, channel, guild}): Promise<any> {
+                if (isAuthorized(guild, channel)) {
+                    const sender = Storage.getUser(author.id);
+                    const target = args[0] as User;
+                    const receiver = Storage.getUser(target.id);
+                    const amount = Math.floor(args[1]);
+
+                    // handle invalid target
+                    if (target.id == author.id)
+                        return channel.send("You can't bet Mons with yourself!");
+                    else if (target.bot && process.argv[2] !== "dev")
+                        return channel.send("You can't bet Mons with a bot!");
+
+                    // handle invalid amount
+                    if (amount <= 0)
+                        return channel.send("You must bet at least one Mon!");
+                    else if (sender.money < amount)
+                        return channel.send("You don't have enough Mons for that.", getMoneyEmbed(author));
+                    else if (receiver.money < amount)
+                        return channel.send("They don't have enough Mons for that.", getMoneyEmbed(target));
+
+                    return channel.send("How long until the bet ends?");
+                }
+            },
+            any: new Command({
+                description: "Duration of the bet.",
+                async run({client, args, author, message, channel, guild, askYesOrNo}): Promise<any> {
+                    if (isAuthorized(guild, channel)) {
+                        // [Pertinence to make configurable on the fly.]
+                        // Lower and upper bounds for bet
+                        const durationBounds = { min:"1m", max:"1d" };
+
+                        const sender = Storage.getUser(author.id);
+                        const target = args[0] as User;
+                        const receiver = Storage.getUser(target.id);
+                        const amount = Math.floor(args[1]);
+                        const duration = parseDuration(args[2].trim());
+
+                        // handle invalid target
+                        if (target.id == author.id)
+                            return channel.send("You can't bet Mons with yourself!");
+                        else if (target.bot && process.argv[2] !== "dev")
+                            return channel.send("You can't bet Mons with a bot!");
+
+                        // handle invalid amount
+                        if (amount <= 0)
+                            return channel.send("You must bet at least one Mon!");
+                        else if (sender.money < amount)
+                            return channel.send("You don't have enough Mons for that.", getMoneyEmbed(author));
+                        else if (receiver.money < amount)
+                            return channel.send("They don't have enough Mons for that.", getMoneyEmbed(target));
+
+                        // handle invalid duration
+                        if (duration <= 0)
+                            return channel.send("Invalid bet duration");
+                        else if (duration <= parseDuration(durationBounds.min))
+                            return channel.send(`Bet duration is too short, maximum duration is ${durationBounds.min}`);
+                        else if (duration >= parseDuration(durationBounds.max))
+                            return channel.send(`Bet duration is too long, maximum duration is ${durationBounds.max}`);
+
+                        // Ask target whether or not they want to take the bet.
+                        const takeBet = await askYesOrNo(
+                            await channel.send(`<@${target.id}>, do you want to take this bet of ${$(amount).pluralise("Mon", "s")}`),
+                            target.id
+                        );
+
+                        if (takeBet) {
+                            // [MEDIUM PRIORITY: bet persistence to prevent losses in case of shutdown.]
+                            // Remove amount money from both parts at the start to avoid duplication of money.
+                            sender.money -= amount;
+                            receiver.money -= amount;
+                            // Very hacky solution for persistence but better than no solution, backup returns runs during the bot's setup code.
+                            sender.ecoBetInsurance += amount;
+                            receiver.ecoBetInsurance += amount;
+                            Storage.save();
+
+                            // Notify both users.
+                            await channel.send(`<@${target.id}> has taken <@${author.id}>'s bet, the bet amount of ${$(amount).pluralise("Mon", "s")} has been deducted from each of them.`);
+
+                            // Wait for the duration of the bet.
+                            client.setTimeout(async () => {
+                                // In debug mode, saving the storage will break the references, so you have to redeclare sender and receiver for it to actually save.
+                                const sender = Storage.getUser(author.id);
+                                const receiver = Storage.getUser(target.id);
+                                // [TODO: when D.JSv13 comes out, inline reply to clean up.]
+                                // When bet is over, give a vote to ask people their thoughts.
+                                const voteMsg = await channel.send(`VOTE: do you think that <@${target.id}> has won the bet?\nhttps://discord.com/channels/${guild!.id}/${channel.id}/${message.id}`);
+                                await voteMsg.react("✅");
+                                await voteMsg.react("❌");
+
+                                // Filter reactions to only collect the pertinent ones.
+                                voteMsg.awaitReactions(
+                                    (reaction, user) => {
+                                        return ["✅", "❌"].includes(reaction.emoji.name);
+                                    },
+                                    // [Pertinence to make configurable on the fly.]
+                                    { time: parseDuration("2m") }
+                                ).then(reactions => {
+                                    // Count votes
+                                    const okReaction = reactions.get("✅");
+                                    const noReaction = reactions.get("❌");
+                                    const ok = okReaction ? (okReaction.count ?? 1) - 1 : 0;
+                                    const no = noReaction ? (noReaction.count ?? 1) - 1 : 0;
+
+                                    if (ok > no) {
+                                        receiver.money += amount * 2;
+                                        channel.send(`By the people's votes, <@${target.id}> has won the bet that <@${author.id}> had sent them.`);
+                                    }
+                                    else if (ok < no) {
+                                        sender.money += amount * 2;
+                                        channel.send(`By the people's votes, <@${target.id}> has lost the bet that <@${author.id}> had sent them.`);
+                                    }
+                                    else {
+                                        sender.money += amount;
+                                        receiver.money += amount;
+                                        channel.send(`By the people's votes, <@${target.id}> couldn't be determined to have won or lost the bet that <@${author.id}> had sent them.`);
+                                    }
+                                    sender.ecoBetInsurance -= amount;
+                                    receiver.ecoBetInsurance -= amount;
+                                    Storage.save();
+                                });
+                            }, duration);
+                        }
+                        else
+                            await channel.send(`<@${target.id}> has rejected your bet, <@${author.id}>`);
+                    }
+                }
+            })
+        })
+    })
+});
+
+
+/**
+ * Parses a duration string into milliseconds
+ * Examples:
+ * - 3d -> 3 days    -> 259200000ms
+ * - 2h -> 2 hours   -> 7200000ms
+ * - 7m -> 7 minutes -> 420000ms
+ * - 3s -> 3 seconds -> 3000ms
+ */
+function parseDuration(duration: string): number {
+    // extract last char as unit
+    const unit = duration[duration.length - 1].toLowerCase();
+    // get the rest as value
+    let value: number = +duration.substring(0, duration.length - 1);
+
+    if (!["d","h","m","s"].includes(unit) || isNaN(value))
+        return 0;
+
+    if (unit === "d")
+        value *= 86400000; // 1000ms * 60s * 60m * 24h
+    else if (unit === "h")
+        value *= 3600000; // 1000ms * 60s * 60m
+    else if (unit === "m")
+        value *= 60000; // 1000ms * 60s
+    else if (unit === "s")
+        value *= 1000; // 1000ms
+
+    return value;
+}
diff --git a/src/core/structures.ts b/src/core/structures.ts
index 0e77494..8dd38a9 100644
--- a/src/core/structures.ts
+++ b/src/core/structures.ts
@@ -31,6 +31,7 @@ class User {
     public timezone: number | null; // This is for the standard timezone only, not the daylight savings timezone
     public daylightSavingsRegion: "na" | "eu" | "sh" | null;
     public todoList: {[timestamp: string]: string};
+    public ecoBetInsurance: number;
 
     constructor(data?: GenericJSON) {
         this.money = select(data?.money, 0, Number);
@@ -50,6 +51,7 @@ class User {
                 }
             }
         }
+        this.ecoBetInsurance = select(data?.ecoBetInsurance, 0, Number);
     }
 }
 
diff --git a/src/events/ready.ts b/src/events/ready.ts
index b8467aa..f147fa2 100644
--- a/src/events/ready.ts
+++ b/src/events/ready.ts
@@ -1,7 +1,7 @@
 import Event from "../core/event";
 import {client} from "../index";
 import $ from "../core/lib";
-import {Config} from "../core/structures";
+import {Config, Storage} from "../core/structures";
 import {updateGlobalEmoteRegistry} from "../core/lib";
 
 export default new Event<"ready">({
@@ -16,5 +16,17 @@ export default new Event<"ready">({
             });
         }
         updateGlobalEmoteRegistry();
+
+        // Run this setup block once to restore eco bet money in case the bot went down. (And I guess search the client for those users to let them know too.)
+        for (const id in Storage.users) {
+            const user = Storage.users[id];
+
+            if(user.ecoBetInsurance > 0) {
+                client.users.cache.get(id)?.send(`Because my system either crashed or restarted while you had a pending bet, the total amount of money that you bet, which was \`${user.ecoBetInsurance}\`, has been restored.`);
+                user.money += user.ecoBetInsurance;
+                user.ecoBetInsurance = 0;
+            }
+        }
+        Storage.save();
     }
 });