Simple, i usually use the profit to re-invest it in other crypto.
If you look at the crypto market now, the downtrend of coins has started, bitcoin price now around $34k.
This is a good opportunity to buy and accumulate some top coins in the market, and hold them until we get a decent profit.
I do it a little differently to you. I take half of the profits for me to use in other needs. like a vacation or some wish that I have to fulfill. I have to do this concept, if all my capital and profits are kept in crypto, this is too insecure in my opinion. because if one day the market falls, we cannot enjoy the fruits of our labor. As it is now, the market has fallen by various factors, one of which is inflation.
It is not safe to use all profits to reinvest. We invest to make a profit, but we should remember that investing does not always bring us returns, there will be times when it makes us lose. Every time I make a profit, I will reward myself with something, a part I will use for life and the rest I will reinvest or I will convert into savings. For me, I've always had a savings account because I know investing is risky sometimes and that savings helps me fill in the gaps when my investments hit a bump.