Also, it's quite a risky assumption as an individual that one's able to make a long-term profitable bet against an army of professional investors that dedicate lots of resources towards making profitable bets in the same market.
As an individual, one is most likely to outperform other non-commercial individuals. It's rather likely in a complex investment environment that money will flow upward from the less well informed and less well equipped investors towards the big players.
Which is why individuals should be extremely cautious where they invest .. lots of options can probably be summed up as: individual lends big player their money gets negligible real return, while big player makes orders of magnitude bigger return.