On the short term BTC will fluctuate, bubbles will come and go. On the long term, I think it's a good investment because there will only be 21 million bitcoins issued ever, and the demand will only increase over the coming years, as the popularity of the bitcoin increases. Limited supply and ever increasing demand will drive the price up. You can speculate and ride the waves of the bubbles to make some extra money (and lose some), but you will do just as well by buying and holding on to them forever. Never panic when the price goes down, just forget about it and come back a month later, it will be back up again. As someone stated earlier, emotions and trading don't go well together. Just buy and hold. It's boring but will pay out well in the end.