I think y'all are overestimating the risk. He isn't throwing it away. He's mentioned here that it's max 1 trade of 1 share every 5min. The initial portfolio is very diversified, so barring a concerted attack this experiment's returns likely won't be much different from a random actively managed mutual fund -- with the advantage of having no management fees and no trading fees either.

And he can stop the experiment any time.