Get this: right now the best card if you can find it, a 3090RTX is priced at around 4000-4500 euros (maybe even higher) and you can mine ETH worth 325 euros a month, so ROI is at least a year plus electricity, that is if the hashrate remains the same and ofc it won`t. Down the line (3080, 3070, etc.) the situation is similar or worst and then you have EIP 1559 in July and the coming of PoS (hopefully, this year!). Already, mining pools are extremely angry and started all sorts of petitions. And if you think they`ll just mine the next most valuable currency I`d say good luck with that at this prices. As for gamers, this just means a faint ray of light, faint, but it is there.