What do you expect will happen?
I exepect that after the price will rise this will attract new miners accordingly the difficult will rise in the coming few months (at least twice... who knows.. ) and if today with 2TH/s you mine 1 BTC/40 days ,in the coming 4-6 months you can expect 1 BTC/~100 days ,so I guess better way is to buy some and not to throw away money for electricity bills