Your skills, knowledge, intelligence, abilities, expertise, capabilities, and competence. Who you are, what you do, and how good and rare or vital you are at what you do. In other words, how capable you are of significantly contributing back to society, and providing others with value and help.
Forget about the stock market. Forget about real estate, passive income, or cash flow. Forget also about money sitting in the bank without ever being invested.
Nothing is going to save you at times of economic depression or recession, or from inflation, unless you’re a multi billionaire, especially cryptocurrency, which would pretty much be worthless whenever shit hits the fan, except how capable you are of making money during any tough time. The only thing that would guarantee you not becoming poor during any of these situations is not how much money you have, or even money generating assets, but who you are and what you can do to make or earn money. Just make sure during times of economic crisis that you are not entirely useless.