It's better to have a permanent job because you can not guarantee a bounty just because the token transaction is not consistent with it. In the bounty you need to wait an announcement for the token distribution, so it's really tedious especially if you need money. And we have no certainty if ICO is true or scam.
In all works, you definitely need to spend time for them and for the salary. You can not give up work but will persevere because we need money in everyday life.
It's not too difficult to determine whether an ICO is going to be successful, so being scammed should be very unlikely if you only apply to ICOs that meet the following;
1. Well known founding team, early-adopters and inventors are ideal
2. Realistic schedule, and minimum viable product ready
3. Realistic chance of meeting its funding requirements.