Don't be crazy, we should not leave Bitcoin. There are many people who say that they are altcoins which work better than Bitcoin because they are faster. Ethereum? It has problem with high fees because of large amount of ICOs going on. Iota? It's an experiment which does not work well, problem with transactions. Ripple? Do you really want to go back to centralized banking?
it's not only about that. We need to set one cryptocurrency that will be used for global transactions instead of trying to invest new better ones. Those can be applied to specific markets in my opinion