Why do you need to invest your savings in cryptocurrency?

Why do you need to invest your savings in cryptocurrency?
Cryptocurrency has not only its value, but also security in the event of a fall in rates. It is very convenient to store and it does not require a bank intermediary. You can always exchange cryptocurrency in any part of the world, and in some countries you can safely pay with any fiat money without resorting to banking services and without losing any excess interest.