Which is the most popular coin after 2 years? 3 years ago ethereum was $ 1. Last year it was $ 1,400. Currently 150
what do you think we should get for 2020?
It would depend on how each altcoins perform and how they adopt their technology to lure investors to invest in their platform. As of now, I don see any guarantee of an alcoins worthy to invest until 2020 because I don't have a crystal ball to predict what's to come in the future.