Tron is the only cheap altcoin that's worth invest money on right now, gradually this blockchain network will expand in near future, that's certain, for the fact that it's still very cheap you can buy with very little money and hold for many years
It's too hard to see TRON price go up as strongly as in 2017, although they are heavily updated and run by Justin Sun. But I think it's not a very good investment for everyone, personally I lost too much when investing in this project in 2018.
I was never a TRON supporter, but now I have reasons to believe that the prices have bottomed out. In case a major bull run occurs sometime in the next few years, then TRON is one of those coins which have the potential to move upward. And I would also say that Justin Sun is behaving in a much more matured manner now, when compared to the theatrics he did earlier.