All of the comments are based on flawed logic. They all assume higher difficulty at the same bitcoin price which is retarded.
The price of bitcoin could very well increase to $500,$750,$1000,$1000+ so arguing anything about profitability is just insane as there are so many variables.
Since when was Bitcoin price based on difficulty? You really think that $500 let alone $1000 range is plausible?
I think Spain, France and Italy all have enough upcoming news to accelerate the value of bitcoin and that's without taking the US into account.
Although I'm not suggesting in the realms mentioned, although I'm not dismissing that fact either.
Bitcoin needs to become a little less volatile and a lot more merchant focused and adopted.