How is investing in stocks not a glorified form of gambling?
When you buy a stock, and it goes down in price a few months later, the experts tell you to buy more of it as it goes down, because it'll probably go up in the future.
When you gamble $5 on a blackjack hand, Martingale experts will tell you to gamble $10 on the next hand, and then $20 on the next hand again if you lose the $10 hand.
Not sure if serious. Investing long in e.g. the DJIA isn't gambling by any stretch of the imagination.
That's not to say there aren't plenty of other transactions that may blur the line a little more. Hell, entire options markets exist to make a commodity out of risk.
When you buy a stock, and it goes down in price a few months later, the experts tell you to buy more of it as it goes down, because it'll probably go up in the future.
When you gamble $5 on a blackjack hand, Martingale experts will tell you to gamble $10 on the next hand, and then $20 on the next hand again if you lose the $10 hand.
Both are gambling.