When investing in cryptos, I refuse to buy coins that try to repeat what Bitcoin already does.

For me, a good cryptocurrency must bring features that wasn't already in the market and that in fact solve real world problems.

Coins that compete with Bitcoin for electricity have much lower chances to succeed. But if it is something really new, like a DAG cryptocurrency, chances are much higher. That said, Byteball is the one that I consider to be the best at the moment, because it fits in all these criteria, and I really like the way they're trying to distribute it to as many users as possible.