I think that should pay attention primarily to the coins that have already proven themselves, namely from the Top 20. I like Monero, Zcash and NEO. Can also pay attention to new projects. For example, on Zilliqa and Quarkchain.
How has Quarkchain proven itself? It was only released a few months ago. Definitely one to watch for the future, but I wouldn't say it's anywhere near proven.
I think it would be best to watch high potential coins rather than already proven coins if you want to see explosive growth.
five coins that are very capable of being the consideration have the potential good in developments that generate even more profits.
like a lot of five coins shows the development in this period, so they will be very good as a material consideration.