You can still mine ETH on a (high-end) GPU and make a profit. BTC mining is way too advanced for that, it's done with mining-specific chips. Mining with a GPU g

You can still mine ETH on a (high-end) GPU and make a profit. BTC mining is way too advanced for that, it's done with mining-specific chips. Mining with a GPU gives you too little hash rate for it to be profitable. Going a bit more in-depth: Mining is a competitive activity. Your chance of being the person to mine a block is proportional to the fraction of the hash rate of all miners you hold. Therefore, if everyone is using super advanced mining hardware and you go in with a GPU, you hold an insignificant fraction of the hash rate and have next to no chance of actually mining a block, while you still spend on power and hardware maintenance - which will probably make mining a net negative for you. Nowadays BTC mining is advanced enough that the only way to make a profit is with big specially-designed rigs located in places with access to very cheap energy sources.