It looks like people like to get some crypto currencies and Bitcoin BTC is one which is now most visible… its reaching 10.000 USD per BTC and who had few bitcoins in when it started is now millionaire. You can mine BTC and other ecurrencies using special HW which might get outdated. Or you can use cloud mining companies so you don’t worry about mining hardware but you only buy computing power. ROI is for SHA-256 somewhere between 160 – 240% and with growing price of BTC it might be even more. Enjoy Bitcoin mining with following companies.