Video narration
Could you trade your apple for your friend's sandwich? That sounds simple, but only if your friend wants the apple, and you want the sandwich. That direct swap is barter: exchanging a good or service for another without money. Now imagine your friend already ate an apple, or simply doesn't want one. You still want the sandwich, but you have nothing they value enough to trade. This is the matching problem called a double coincidence of wants: each person must want what the other person has. And there's the catch. Money creates a bridge between the two trades. You sell your apple to someone who wants it, then use that money to buy a sandwich from someone else. So, could you trade an apple for that sandwich without money? Yes-but every deal would depend on finding someone who wants exactly what you have.