your questions are difficult to answer with certainty will get a profit, just do what you think is good, but I invested the BNB and Link because I felt the BNB had enough potential in the future.
In fact, investing in the altcoin market in 2021 is slightly easier than in 2018-19. Therefore, before all the coins looked the same, the entire top 100 followed Bitcoin, there was no variety.
This situation is similar to the previous one, however, there are much more coins of different directions, centralized, decentralized, privati coins, and so on.