Yes me an advice should be mining need the wolrld level business.you might be feeling a bit mining if you’ve got any money invested in them.my suspect is that most of the machines that weren't profitable now are. I also understand that old machines can compute less bitcoin as the difficulty increases with the number of machines mining.an advice on good profitable growth the mining industry.I would like to start mining, but without a big investment. I want to see if I like it and if I want to invest more time, money, energy on it.