In a legitimate land grab style business model you could be working lots of hours for a rather good shot at very large amounts of money. I don't see anything wrong with burning the candle hard for a few years on a well calculated risk for high payoff. However, those situations are quite rare and for the most part people are working themselves to the bone for an expected value payout of peanuts, IMHO. In the 90s software and internet booms there were lots of clear land-grab plays going on where among a handful of entrants first to market with a strong product was going to finish rich, and that was indeed ultimately the case.