 Imagine you go into casino and they say you need $25,000 before you play Blackjack. If you don't, you're going to play three hands of Blackjack and get the fuck out. That's because the more market participants, the harder it is for them to rig the system. Harder it is for market makers, banks, institutions to set arbitrary prices because the demand keeps the market clean. Capitalism is supposed to be free markets, but for some reason, why can't I participate in the stock market? Which is one of the sole reasons why these guys are billionaires.