There are actually so many good altcoins that could possibly let you earn. However, so hard to find and locate them. This because there are so many altcoins or projects that failed and only few are really successful and has been doing what a real project work. This is why to those who get lucky enough to be part in the right project are earning huge profit. They are really fortunate one to find the real good project.
Maybe if we can stick to the top 10-30 coin list, we will have a chance to make a profit in the coming of the altcoins season. We have bitcoin in the first position, and the next will be ethereum, and the next coin will still mystery because the other coin is not yet increased so high. Maybe you can watch on litecoin or bnb which I check can increase the price to $100 and $32. But I agree that there are many good altcoins which have the same potential to grow.