1) Hold 3 BTC with the potential it being worth $100.000s or more in years time. You can spend it however you want but you cannot buy more BTC ever.
2) 20 Acres of Tulip fields. You can only use it to grow Tulips and sell them on in The Netherlands. Annual profit $25.000 but you don't have to do anything.
3) Have Emily Ratajkowski as your wife. Put up with her body and her shit for the rest of your life with no option for divorce, ever.