Make sure you understand what it is. If you believe in it a particular technology and think that is will be the future of money as we know it then buy the dips and stay in for the long haul. You may be rewarded greatly or you may lose everything you put in.
At this point we are waiting for a catalyst, some large scale adoption of the currency. Once that happens things will spike and stabilize. It will hopefully be more stable like standard currency at that point and will be able to be used like regular money (with out all the institutions taking their cut for the trading of it).