Why am I dumb and greedy?

It is my savings but on another hand i don't really have any debts so it's money that I can afford to risk. It would either sit in my bank account or have a chance of doubling or tripling in the BTC market. I don't have any kids, I'm making my own money and I'm single.. I figured this is the best and only time I can take risks like this. I mean, you don't make big money by playing it safe. I want a chance at making big money. I know this sounds greedy and as if I think Bitcoins are a "get rich quick" scheme, but I'm really understanding the value and benefits it will provide, and I think 2014 will be a good year for bitcoins. I still think it is at a very early stage and undervalued right now. The greedy test will come into play when the price goes up a lot, and I keep holding hoping it will go up even more... I need to figure out exactly when I should back out and keep my profits, and then invest again with a much lower risk to my overall net worth. Does that sound stupid to you? If so, we're just different kinds of people.