Um how about never. Its more likely that the bitcoin will be worth even less by this time next year. The bitcoin dropped in value due to several reasons; Banks wont support anybody using their account for transactions, the lose of the original silk road, the lose of very popular exchanges, and finally the significant increase of scams when the value was high. The bitcoin got beat-up in 2014 and at the same time the mining difficulty kept climbing at an exponential rate. Now we are looking at the fact that mining bitcoins is just simply unsustainable. Home mining is unprofitable and cloud mining the new hope. Cloud mining is a huge rip off. Its only a matter of time before mining bitcoins is just unprofitable for any body.  I think in the future electric companies wont support mining bitcoins. If they see electric usage skyrockets they may cut you off.