Strongly agree that the best bucket is going to be composed of a vast majority of bitcoin and ethereum.
I don't believe crypto is on the whole in a bubble right now but the fact that Bitcoin Cash has a market cap of >$5B is one of the biggest things that makes me question that.
The scumminess of it comes from people like Roger Ver who peddle it as the "true" BTC. e.g., bitcoin.com is owned by the BCH folks and they have several intentionally misleading things there that try to re-brand BCH as BTC and BTC as BTC legacy or whatever.
Ripple is for instance not a cryptocurrency, and everyone knows about the scam that is Tether.
Litecoin has zero development (except to copy what Bitcoin is doing) and the development in Bitcoin itself has some serious issues.