If you know a coin is going to go down, then why not sell it and buy back at the lower price? It's one of the best strategies I use. It's basically a free way to increase your position in a coin. I've been doing this with XVG since back in December. Have already tripled my investment off of it.
Which is fine IF you KNOW coin is going to go down, which I would guess the vast majority of people don't, including me.
Tried that, got burned.
Holding is the safer option if you feel confident that a coin is worth more than what it is currently valued at; just my opinion
