I'm thinking, in the future scenario where bitcoin is the standard, why wouldn't those who missed out not just start a new network on all the same code? I have heard of side chains, but I don't think I mean that. All the same rules as current bitcoin, just another version. So, 21 million of bitcoin1 and 21 million of bitcoin2?
If bitcoin is the best money, why wouldn't a second bitcoin chain with all the same rules also be good? Is it just the effort and knowledge for now? But, in the future, some industrious madmen might want to start over?