I think everyone in the world should make a coin with the same supply.
Your thinking is very strange, if everyone has their own coins, then, who buys, each one already has it.
From where these kinds of ideas and come to your mind, I hope you are well, not in brainwashing.
If everyone chooses a mind like you, this world will experience an unbalanced tilt, there will be no more poor people in this world, everyone already has their own product to use.
I have the same thoughts, why and where in the hell the OP get this idea, really absurd really to the boundary that it gives me a good chuckle.
Anyhow, it's not going to work this is not how money works in the first place. There are a lot of crypto's already that we can used as money, so it doesn't make sense at all.