it's hard to predict if we see which coins are better because I think some of these coins are good but we have to look at the potential of the next few years if we invest long term because not all coins will be good for a long time...
This kind of Op questions are the questions that each person will always have to answer on their own. You have to do your proper research to know the market you really want to be investing in and then compare each market in terms of prospect or based on what you think. There are so many assets out there, and no one can tell how far they will go, but as long as it is worth being a part of, then that is what matters.
The best cryptocurrency to buy and hodl right now is Bitcoin, Ethererum, Cardano, Ripple, IOTA and Tron. My opinion.
Those are certainly some pretty good coins worth holding at the moment and for the fact that they are some of the top coins with high market cap; it makes it easier for anyone to make the decision in joining where the smart moneys are joining which gives it less risk than low volume markets. Cardano most especially looks like a sleeping giant at the moment and I would not be surprised to see it go bigger in coming years.