The main point of
cryptocurrencies Bitcoin, is not to fix the fiat system, but to create a free, trustless network with no centralization of power.
All of the cryptocurrencies adhere to the 5 properties and 3 functions of money. They each also attempt to solve one or more real-world problems.
All of the cryptocurrencies do not adhere to any function or property, a vast majority if cryptocurrencies are shitcoins with no real world value and no solution to any problem, but they were created by devs who wish to make some bucks out of the crypto space.