I think 'diversifying' is a legacy investment fantasy. All of this crap lives and dies in the same market. You won't have a $1000 ETH and a $10 LTC. They're both going to rise in a broadly similar manner.
Similarly I've seen people diversifying by buying coins with different consensus mechanisms as if that's some sort of warranty against doom. Gimme a fuckin break. No one cares about any of that, even fewer understand the difference.
Individual coins can make short term explosions way above normal but they rarely last and there's no way of telling what's going to do it.
If you do want to spread yourself then only put the majority into stuff with muscular volume. If you want to make some wild bets then make sure they're modest.
I'd agree with this, but the main thing for me is their order in marketcap - broadly similar to volume I suppose. High cap stuff is less likely to fall to $0. Equally high cap stuff is unlikely to go x100. The reason high cap is better is that low cap is where the crap lives. There will be some hidden gems down there, but they're often very hidden. If you buy into random low cap stuff, your money is going to disappear.
Crypto is enough of a gamble as it is, don't make it worse for yourself!