just run it efficient and add some gpus
let's say your have 50 1080ti's at 46MH = 2.3GH ...if you are happy with your current profitability and then they lost 2MH each, then you are at 2.2GH..solution: add a 3080 or a 3090 and then you are back to 2.3GH, this way you might want to try your next brand/model of gpus that you will upgrade to before buying in bulk

you can add piece by piece and you can sell piece by piece..
but if you made a lot of money due to bear market patience and trading then just put them all in a box and replace them all with 3090s/3080s ...unless you choose to be more exposed to coins, betting it will go a lot more higher.