Randomness!
There are some super smart guys on this forum who think they can predict coins like LTC due to actual facts. It's almost hilarious if it wasn't so pathetic. The truth is 90% of big moves are irrational and based on intangible human moods and whims.
I've made more money than most simply sticking my finger in the air and testing the mood, often being contrarian rather than following the crowd. But seriously logic is the last thing you want to follow.
Efficient market hypothesis. But not as it is usually understood, but rather that the information (even "irrational information") is already included in the price, and that you can't know better than the market, but only gamble on it.