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.
In my opinion doing re-investment is indeed very appropriate but you must know that not all coins can make a profit quickly, when you look at the condition of the exchange as it is today, it should be able to provide information that not always cryptocurrencies can provide a lot of profit, so you still have to be careful when investing in cryptocurrencies.
Analysing the market condition is very important. Not all will bounce, but I'm with you in choosing top asset they are most likely to bounce back when the market starts to pump. It's more about how you anticipate and the timing of your investment. Profits from crypto are good to grow your initial capital, re-investing and keep your compound capital to work passively is a kind of investment most investors want to achieve.
It's more about how you dedicate your time and equipt yourself with knowledge that you can use while working in this market.
Not easy and too risky, but in terms of long-term investment, success will be there if you are keen to learn all the knowledge that you need.