The gambler's fallacy: Everbody wins! It works like this. People who win make a big fuss about it. People who lose either keep quiet, or pretend they won and make a big fuss about it.
Reality: in the long term, almost every gambler loses. It's a zero sum game and it's biased towards the house or the bookie.
Maybe on this occasion, you took a punt on spending electricity and computer opportunity cost on bitcoins, and on March 13th 2014, you are up on the deal.
2 things may go wrong. One is that you'll keep on holding even after a fatal crash. and those gains are not realised.
Second is that you will during the course of your life also take other such punts on unproven investments, and lose more than you gained on bitcoin.
Millions are being taken out of the bitcoin game by fraudsters and thieves. It's a zero sum game, their gain will be matched by the losses of ordinary punters like you.