Okay... but on Quantopian you just write algorithms, you don't have to invest your own money. You don't mess up and lose USD, you don't pay a membership fee. T

Okay... but on Quantopian you just write algorithms, you don't have to invest your own money. You don't mess up and lose USD, you don't pay a membership fee. The site's owners decide to invest with the best algorithms on the site, and you get a portion of the returns if they choose yours.