I think the best and steady income in bitcoin is to have bitmain miner s9 is a
good idea to have and i think you ca get your capital money when you was buy a miner..
and tools.. this is i think the best steady earnings than the other activity..
This is the best for OP to know since he stated that steady income but without actively doing anything, no trading/gambling/loaning indicated you just need to have miner at home.