Every article I have read so far on the current state of Bitcoin seems to think that it will keep rising, but there will be a correction/crash very soon. I'd say it'd be okay for a quick flip once it peaks, but many investors seem to think that it is going to peak soon. Of course we won't know until it happens, but that's the prediction.
EDIT: So far Bitcoin has seemed to be a worthwhile investment for MANY people, and even turned a couple people into billionaires. If you're in it for the long con, Bitcoin is worth investing in to since the difficulty of mining Bitcoin continues to go up, meaning the price will continue to rise over long periods of time. This topic is something you should probably research yourself, there are MANY articles on the Internet that could help influence your decision.