Yes, a diversified portfolio is always the best. Still, some coins should remain as your primary or secondary investment, such as bitcoin, ethereum, bnb, sol, avax, matic, and atom. If the coin's price is down, you can buy back again while still waiting for the coin to increase. We need to remove not potential coins that we have and replace them with the other coins. You should analyze the coins to find the right one to do this. From that list, I think you can select Matic and Atom for the next investment, but the other coins also have the same potential to increase later.