According to Getaround’s estimates, car owners that routinely lend out their car can earn “$1,000s per year actively sharing your parked car”. Considering there is no effort needed by you, it’s a pretty good way to make money. That being said, your car will likely depreciate a bit faster by virtue of lending it out to other people. If you have a big car loan or are underwater on your loan, putting your car on a site like Getaround might not be a great idea.
Get-rich-quick schemes and fad weight-loss diets are naturally popular because they satisfy the id while also attending to the super-ego. The ego's job is complete when it sees something like this. The appeal of "fast'' stems from the innate desire for instant gratification, so beware of what seems too good to be true (they often are) when you're looking to make money quickly. Be wary. Listen to the conversation deep within the confines of your mind and do your best to tame the proverbial beasts.