You can always switch to another Altcoin though, if one turns out unprofitable, find some less-known coin that seems just a tad promising, UBIQ, ZenCash and many others out there. Had tried Monero with my hardware and Minergate, wasn't making much. The minergate miner could be at fault though, didn't try another one.
True,if you found out that it is not profitable anymore on mining Monero then switch into other coin since there are lots of selections out there to be mined.Its not surprising for sudden mining difficulty jump considering that there are lots of people who do mine monero and also this thing isnt just happening on monero alone but most all altcoins in the market which is mineable either on cpu or gpu.