...Is it okay to rotate my profit into another coin, or should I invest it in a stable coin or leave it in USDC?..
It depends on your expectations for the market, whether it will continue to grow or a correction will follow. If you expect a correction, then you need to transfer your profit to a stablecoin. But in any case, if you decide to invest your profit in another coin, it is necessary that its price is not high.
The correction for BTC into 90-80k is imminent in my book.
We can't be sure where it would be - but I think getting some profit during the new ATH, like 120k or so would be the best option.
NFA.