The FIRE movement has become really popular among millennials. The simple fact behind it is that you need to accumulate an amount that is 25 times your annual living costs. If you spend $60k annually, you'll need 1.5 million (4% SWR) to be set for life.
Millennials try to achieve this by drastically cutting down on their spendings, saving as much as 60% of their incomes.
I believe we Bitcoiners can achieve this easier and faster, throw your ideas.