I'd say it is really hard to be profitable in mining, the return rates have became low.
If you are not a professional miner, getting industrial electricity which is cheaper, it does not worth the investment to get into bitcoin mining, in my opinion.
If you have a good PC, you might want to try mining other coins, other than the big ones (ETH, BTC).
(and please, improve your english a bit)

Also, you might want to read the Mining section of this forum.