having mining hardware for make permanent earning or salary is best inovation before go full time on bitcoin, we can use salary from mining for daily cost and trading as bonus 
I hope it is more profitable now, considering the amount of investment you need to buy the hardware before you can start mining that is already expensive and also the bill should be settled regularly so the expenses is really fixed while the mining difficulty increase and the price is falling back. I would prefer trading than mining. It can be profitable if their electricity is really cheap. The return of investment for the mining rigs can be easily achieve in a few months. The real factor in determining profit is electric and internet bill. If these two is covered, they can easily earn a living thru mining.
yeah the first thing that you have to consider about mining is the electricity cost and then you have to choose wisely, for example these days mining altcoin is a lot more profitable but only if you choose the right coin to mine and sell it on the right time.
besides you have to run the mining equipment for long hours which can be unsettling for many at home because of the noise and the heat.
