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.
actually there are many coins that are suitable for investment one like the coin that you mentioned BNB, BNB are pretty good if you look at their developments and the price is not too expensive Other coins are on ethereum, Ethereum movement is fast enough and the price hasn't reached its maximum yet ethereum likely will rise again from the current price