If you judge "success" by gains down purely to short term speculation then the figure is probably a lot lower . If this is the case then be aware that you are backing a pump and dump and get out a.s.a.p. In the real world most startups in mature markets such as software, biotech and electronics fail. They fail for a number of reasons ; because they miss milestones, a better technology comes along, the product fails, they run out of money,or they are just unlucky. By contrast crypto is a very immature market with as yet few working products and plenty of "dodgy" ICOs and coins.Consequently I think that the attrition rate will be huge and I sincerely think Andreas's prediction is nearer the truth.