First let me just say that I have too many coins. Dozens.
But if I had to pick a top 5, I'd say (beyond the obvious BTC/ETH)

ADA
XLM
GRT
DOT (plus all its projects, POLS, REEF, KSM, etc.)
LINK

I'm expecting all of these to go much higher than they are now. Each one delivers incredible value, either currently (most of these) or likely in the near term (ADA).