it's the best way you can earn and save in bitcoin try to buy 1-2 antminer s9's in the start and then build your mining farm.
Well, I read somewhere in the forum that instead of the person buying these antminer s9 and bitcoin mining, the best option was to buy some good video cards a good processor and mine altcoin. Maybe I should have got it wrong, anyway, you can learn more about this in the mining section