What do you think is better to buy a crypto currency for a long time?

What do you think is better to buy a crypto currency for a long time? The question was created after the real leaps to the top began, well, and then the fall and again the rise ....

At the moment, I chose for a long-term investment:
Waves - put a little on the official purse and there drip on the sly interest. But this is for a long-term investment, I'm waiting for the course to jump up and sell, and if not then at least the interest goes ...
Bitcoin Gold - a little dug and left aside.

Litecoin - Left a little, it can grow as half of the bitcoins :)
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