Today I was thinking about making an investment basket. I figured I'd split it in half. 50% of the coins will be stable top20 projects on coinmarketcap, and the other 50% will be new promising projects (simply more risky). I haven't picked out exactly which coins will be yet, but I think overall there will be a maximum of 10.
As for your list, he would definitely leave on it:
  Ethereum (ETH)
  Solana (SOL)
  Avalanche (AVAX)
  Shiba Inu (SHIBA)
  Polygon (MATIC)
  Cosmos (ATOM)
  Decentraland (MANA)
  The Sandbox (SAND)

I would remove:
  Gala (GALA)
  Chiliz (CHZ)
  Enjin (ENJ)
  Keep network (KEEP)