To be successful in the trading game, you need to be an ice cold bastard. Few people have what it takes emotionally and the ones who don't should stay away from it.
I absolutely agree. I know I don't have what it takes so I just restrict myself to play only with a small portion of my total number of coins. I did more than double that small amount of BTC since the top in December (after losing 30% of the same amount trying to make trades during the big November rally), but I probably would have made more stupid emotional decisions had I used a larger portion of my BTC stack to trade with.