Is it a worse place to put your money than USD or housing? Where do you suggest we put our investments?
There’s really a lot you can do
[1] https://www.wsj.com/articles/a-crash-will-come-and-thats-ok-...
In a casino, it's the impetus of the establishment to make money. In the stock market, it's the impetus of the shareholders to make money. If the house always wins[1], shareholders are the house.
1. This is a tenuous metaphor for the stock market--true in the US over long periods of time, but perpetual growth is not guaranteed.