As a matter of facts, the best and ever sure ways to make income online is through crypto trading/investment, and good bounty campaigns. I will also add forex trading plus stock if interest persons are patient and has some capital.
Now, with some little research, I have discovered that the most common and quick way to earn online is through crypto trading. You just needed little tutorials with average capital ( at least, $100) to start trading and within a short time you may be getting some required experience to go further.
Stocks is also good but you trade through experienced broker, and with a good capital ( at least $500) is necessarily to make good returns on weekly or monthly basis depending on the market conditions.
Bounty campaign is a very brilliant way to earn online but this days many bounty campaigns can hardly profit hunters. Some of the bounty campaigns project has no good intention, either some the project team crashes the price or the exchanges where the coin/token are listed systematically drop the price before hunters are paid etc.