I came to know cryptocurrency the same time I came to know Steemit. And I can say that until today I still have no idea about cryptocurrency. I mean I know very little of it. I bought some coins and keep them in my wallet and I just watch the changing on my balance. One idea I have only: I will hold until I can no longer holding them, I mean I will cash it when I desperately in need of cash and I have no other source, no matter what the prices are when that time comes.