ADA. Yes, the price has disappointed, but newbies need to understand the value it holds. I've been keeping it in my portfolio because I know the price will rise eventually. That said, I do have a pretty diverse portfolio and use a crypto trading bot (R100K) to keep it balanced.
Coins like ADA that you mentioned have not shown strong performance at the moment. Today only CTK has started to move up. I think after BNB finishes reaching ATH it will be the turn to ADA or other coins. Last year I saw this pattern. What is clear is that everything will rise again. That's the crypto market, if we are impatient don't expect to make a profit.