It is not possible for anyone to give an exact answer to this question.  Each different investor supports different projects and believes that different projects will yield good returns in the future.  For this reason, everyone's answer will be variable and a definitive answer will not be given.  The most useful suggestion I can make to you is to do your own research and make your choice based on the data you will obtain as a result of these researches.  No one can give a definitive answer or predict which investment instrument will earn how much in the future.