Even if your power cost is 6 cents, it's probably a good idea not to own any Radeon RX 5000 or older / GeForce GTX 1000 or older video cards. I would wait until the big PoS crash and buy RTX 2080 Ti's or RTX 2070 super or RTX 3060 Ti cards for cheap, as they are very good at non-ETH algos.
What if we don't go lower? What if you will end up waiting for something that will never happen? If BTC bottoms at 28,000$ to 32,000$ then it's over, Ethereum won't dip much more than many expected, in this case what will you do?.