The poor simply can't afford stocks, and I expect the middle class to make different kinds of investment. Like property (buy a house), and low risk saving accounts that may be backed by stocks but the owner of the account is not the owner of the stocks. There may be a small part of gamblers who play the stock market like they are in Vegas, but I expect most stocks to be owned by very rich individuals or institutions, who can mitigate the risks by having lots of stocks, and also have some amount of control on the companies they invested into, rather than a millionth of a vote for small investors. Among the institutions are the ones that provide financial services to the middle class.