I think the author should produce some data showing this is a viable strategy before he gives people advice that could lose them hundreds of thousands of dollar

I think the author should produce some data showing this is a viable strategy before he gives people advice that could lose them hundreds of thousands of dollars. Other people have pointed out the statistical problems with this strategy so I won't restate them. The author may sincerely believe in his own advice, but we should note that he did not, himself, get rich this way. A dropout from elite UK universities, he founded a startup and exited for a small amount of money. Since then he has worked for Y Combinator, invested, and also founded a few companies. Taggar has never, himself, been anything like a startup employee. And great for him; he seems extremely talented and maybe that route isn't for him. But his company (TripleByte) profits from directing talented people into these kinds of companies.