Twitter stock just went down to $49.60 today. I don't know if they would go back up to the $50 mark or go down even further.
I would stay away from Twitter. It's one of those limited internet stocks. I'd way and see if they find any new ways to generate revenue before I even thought about investing in their stock. It doesn't have a very high ceiling and it's best days may be behind it.
I've never bought twitter stocks. I personally am against social network stocks because I feel that they will eventually die out and as a result it is useless to purchase the stocks with a long term view. I personally believe that social networking stocks aren't worth it unless they become severely underpriced like facebook was when it was $20.