Bounties have been nonpromising and the worst of it all is airdrops and surveys. Lots of scam projects around the corner, and even if a project might be legit the focus that people put into it is limited since there is no trust again. However, out of the few picks you have mentioned. Ill choose staking and investing. I wouldn't advice anyone to trade yet until he is financially stable so that whenever he loses some money on trade he can quickly earn back that money after some few hours.