I'd use half to buy 3-4 big name coins and use the other half to buy 5-10 coins that are less well known but that you believe have potential. Ones that have an unique (and usefull 😉) idea that current coins don't cover.

Personally, I'd skip Bitcoin: because it was the first it will probally be around for a long time, but coins like ETH will eventually rise over it (in my opinion).