Why are coins round and not square or cubes, etc.?

Question

Why are coins round and not square or cubes, etc.?

In: 265

Answer 1

Have you ever tried carrying a metal square or cube in your pocket? How about a handful or a dozen of them? If you need someone to EIY5 why that’s a bad idea, you need help.

Answer 2

You ever try to roll a square down a vending machine?

Answer 3

In ancient China they had currency in the shape of little knives so they were both functional and used for money.