Should I sell out all ETH? Or keep ETH on hand and keep mining patiently in order to come across next bull trend?
ETH is always good to hold and store securely, because the token has always had value and interest in the market,
so keep mining patiently and release it when that's really enough for you.
If I am mining eth and holding it, won't sell right now. The possibility of increasing its value in the next coming months is very high, once they launched their berlin hard fork and address the gas fee problem. Won't doubt the capability of eth network to grow as they are one of the solid crypto projects. But if the OP can't wait and has financial needs, he can sell some of it but only what he needs.
I'm guessing you are talking about the EIP1559? Well there is no certainty that ethereum price will surge just because there is ease on gas fee and also do you know that mining reward will go lower once gas fee isn't high anymore? The reason why eth is the most profitable coin to mine presently is simply because of high gas fee