Which one is preferable short term trading or bounty campaign?
Have limited investment around $400.
Give me some suggestion!
Do both man, believe in yourself. You can do it, just be serious about it and put a huge amount of effort and time. Be dedicated, I am sure that in no time you will be experiencing the benefits of doing both and will be happy with the results. It maybe hard and taxing at first but you will find that it is the best decision you can ever make. good luck

Be professional by doing only one job is not good for online job like this. We should do our best effort to join anything available to get money here. Our creayive is number 1 here so dont ever think by doing 1 job we can be success. It might be true but it will be quicker become successfull when we do both.