I'm not sure though what would be a good way to select them.
Agree, you probably want 100+ coin, ideally including utility tokens and others.
You could have different funds in the crypto space, just like in equity.
Apart from large cap, mid cap and small cap funds, you can have thematic investments. One fund could invest in coins which have an anonymity theme.
A cross-country,cross-theme, diversified(including ideally counter-cyclical) backed-crypto could be an interesting play at a more stable coin (lose less value each dip)