This question is being raised every once in a while. Truth is you never know the price of bitcoin in future. If you calculate profitability back in Dec 2012, it didn't look good. You could brake even in some month, but price wasn't good, till April, when it hit more then $200. I'm a long time miner and i try to save 95% of the mined coins for the future. Selling 5% to cover electricity and maintenance costs is what i did throughout 2013. I invested coins into asics thou. First asics came in August, calculations show me that i will not brake even. Ever. Then November came and price went to $1200, which made me a very good profits.
We don't know how the price will be going within 2014, but i have hopes that Bitcoin will be highly adopted worldwide and price will go higher and higher.