People that make good amount of money even though they didn't have any capital at all usually have a good skill set and is a persistent person. I don't know what they are  doing. they might be spamming this forum for signature campaign earnings, they might be scamming people, they might be running a ponzi site, they might be selling drugs, etc. But you should definitely ask him what he's doing and see if it fits your standards in morality and if it fits your time. If so, then go and do the same thing as him. Be persistent because 1BTC a month is a huge amount of money.