I guess Klaus Schwab knows why money should have the ability to expire..

“Expiring money, one whose value falls to zero after a specific date, is a potential monetary policy tool . “Programmability,” a technical feature made possible by digitalization, can accelerate decisions to spend it, making it a very effective means for stimulating consumption.”

https://blogs.worldbank.org/en/allaboutfinance/expiring-money-part-i