Damn_Underscore posted...Let's say you won $1 million in the lottery. You take out $50k for emergencies and live off a $50k salary every year.
So you have 19 years to live as a NEET until the money runs out, but if you invest the rest at just a 6% average return and taking out $50k every year you'll get back about $1.2 million after 19 years (source: https://www.thecalculatorsite.com/finance/calculators/compoundinterestcalculator.php)
The better your average return the more you'll have after 19 years, then you can repeat with a bigger salary for yourself if you want.
you forgot to pay your taxes. you'll most likely see 60% of that money. so you get 50,000 for 12 years, which you probably cant live on, anyway, then back to work.