As of now there are so many bounties who went out scam.
But still there are so many project who are real.
trading is good now also, its been a long time that even at bear market we still have the best opportunity to gain.
Agreed bounties can't provide a good stream of income due to increasing rates of scams and unfavorable market conditions, while gambling is completely out of it due to its risk and mining is capital intensive which requires high investment to be able to compete with high tech companies my best option is trading having acquired the skills in trading.
Weaknesses are not of these things but of a person. If you are capable to trade well, takes your decisions on the right time, know how to upgrade your rank in campaigns and get a project, have gambling tricks and experience, and also know the full process of mining, you will never lose your money. Three things are good for making money while gambling depends on luck.