Overall does not mean anything when you lose 50% of potential profit overnight :c
*disclaimer* I am a miner, though I do speculate (poorly) with the leftovers
anyways, I lost a ton of "potential" profit by selling at 20, 40, 100, 150, etc... all the way up to 200 at which point I was tapped out (I have a small hoard of coins that I am not putting up on the exchange, just in case)
I can't call the tops, or the bottoms, and I've quit trying.
I just sell enough to pay the rent, and if I have extra, I'll just hold on. When the price goes ballistic I might sell a little more and consider buying more mining equipment, but asics are kinda ruining it for me. (I don't like that I can't just go to the store and pick up some hardware, maybe someday)
lately I've tried to just keep half and sell half, but during the run up I couldn't hold back and sold nearly 3/4 of all my coins...
I cashed out and bought silver, and I kind of regret it, because I had no money left in the account to buy back in when it dropped, but I don't worry too much 'cuz I'm still hoarding some, and I still can make a few per week...
but still, moving forward I think I will try to keep at least some kind of minimum amount of both BTC and fiat in my account so I can take advantage of moves that go way beyond my expectations.