well I think you are doing a good job to diverse your assets by divide it into 11 coins.
For me, I hold only 3 types of coins, BTC, ETH, and ADA. I am thinking to invest some on alts because the price is low, but really not sure which one is best to invest right now.
I'm sure he is a pro in investing. he can decide to invest and focus on the 11 assets he owns.
I myself, like you, focus more on only 3-5 assets for short and medium-term investments. and 1-2 assets for a day trade.