Why Do We Have Cash, Cards, and Other Payment Methods?

Cash, cards, and payment methods are like different ways to say, 'I want to buy this!' Imagine you're at a store and want a toy. You can give the shopkeeper real coins (cash), or use a special card that tells them how much money you have inside it, that's like using a magic piggy bank. Some people even pay with their phone! All of these are payment methods, which help us buy things without needing to count every coin.