[sgjohnson]

>It’s a zero-sum game, because there are always winners and losers in the stock market.

Not really. Yes, there are winners and losers, but my win doesn’t equate your loss.

[Traster]

And it's also worth remembering that the stock market has increased in value (inflation adjusted) for decades. So whilst yes, it's true there are winners and losers, most of the time the winners outnumber the losers.