Which one is preferable short term trading or bounty campaign?
Have limited investment around $400.
Give me some suggestion!
When you participate in bounty campaign, there is no initial investment. I think you are referring to trading, yes that $400 of your is enough for a start and you could work around with it.
Doing both is already different thing, when you do bounty you don't need to invest in it, you have to work for it, while doing trading is also a different thing, you need to invest and watch your investment grow.