When, in a society, you have developed the methods to turn a profit when the market goes up, and you have developed the methods to earn a profit when the market goes down, then you can fully expect that the market will not remain stable for long. Eventually someone will pluck the string.
Then, in those oscillations, they will accrue profits at the expense of the universe. Molecular friction. It all turns into heat. We all lose energy during the return to the stable state.
Keep this in mind when the market gets destabilized by sudden policy changes. Tariffs? Someone’s profiting. And it’s not us.