The coins with real use and solving a problem are the ones that will survive. Bitcoin is a store of value and the most people use it, Ethereum is basically a computer on the blockchain where you can create decentralized applications on top of the network that are transparent, cannot be modified, and operate with no centralized party. That is definitely a use case that will be needed but many networks are doing the same thing with faster transactions and with faster development now so will ETH survive ? IDK they have to keep up with the competition. Bitcoin does not have that problem because theres no other serious competitor for the Store Of Value usecase