If no other coin is very interesting, perhaps we could find another use for our GPU's ? I'm thinking about lending them for AI - deep learning purposes. Those tech are very GPU compute hungry. Perhaps miners will associate in groups to lend their GPU's power for deep learning, who knows ?
The question is will your new venture be as profitable as it has been with ETH and some alts?Will keep buying newer GPUs to lend them for AI - deep learning purposes, just like you did when mining cryptos? I don't think so
There's a beauty about crypto mining and one of them is some level of privacy, independence and decentralization where no one dictates what you should earn except you and your machines.