Mostly, I flip coins or just take little chunks of profits from assets I have to buy a completely new coin. But my maximum number of top altcoins to hold is just 10. While for start ups, or shitcoins mostly 5-10, maximum would be 15 since I do not keep track of these shitcoins unless I really like it and each coin would only take up 5-15% of my shitcoin capital which is 30% of my overall capital. I also stake some token and do yield farming but only a few since I only trust a few of what I see right now. And then there's NFTs which are pretty fun to flip and collect.