"All money in crypto was invested by people who worked for it."

wrong actually. Profit can't exist without taking others resources through force. The majority of money that has gone into bitcoin is from the capitalist class or the labor aristocrat.

https://www.marxists.org/archive/marx/works/1847/wage-labour/

That book explains it well

"making money off of other's labor isn't even a factor"

its just moving around money. As the price of the market increases more people invest. Once it goes mainstream they will be profiting off of the work of the majority without doing any themselves. Mining is an example of this. Currently you are making money off of investors who hope to do just that.