Best way for steady income is investing some of the games which can bring you a lot of profit. Investing in may of the other gambling sites can earn you a lot of profit. I have been earning by writing in bitcointalk and gambling.
Investing in bitcoins is never a steady way of earning profits, if you are talking about gambling the money then that is totally out of the context, but if you are talking about investing on bankrolls then that is also not really a stable or steady way of earning profits because sometimes you can also pick up loses in such investments.