The best of cryptocurrency happened last 2017 in terms of market capitalization and prices. But, that was due to the hype that brought a lot of new investors to enter th cryptocurrency. Year 2018 brought the corrections to the 2017 hype. Now, 2019 the prices is fluctuating at steady market.
I think cryptocurrency will soon be maximized and utilized fully as it was designed to be. The technology is very young that it has more to improve.