The best investment to gain steady income in btc without actively doing anything is simply buy and hodl.
Holding doesn't mean that you can really make profit there in altcoin there are some ways that you can really to some steady income job when you are in signature campaign data encoder and anything investment doesn't mean income too investment is resulting of scam.
If you are expecting a steady income from an investment then you are on wrong track as investment will never give you stable income and you may even loose everything in long run if you invest at the wrong place.
Investment will never give us steady or stable of income every week or month but if the investment is gambling that can give us good bankroll after the investment why not ? it is good when we are investing it in the long run and the trust on that gambling is really big.