Cryptocurrency Will Kill Cash ? Is this True

[dumplingsandsushi]

It's ridiculous to say that crypto will kill cash.
Why would it?
Because the world is becoming more and more paperless?
We already have credit cards and electronic pay solutions for that.
And tell me, name one advantage that crypto has over these that makes its everyday use worthwhile.

Hint: there is none.
Blockchain is more time consuming, energy innefficient, and expensive to use.
I imagine one day we will get to the point of something like nano, or iota where it is fast and has no fees.
But for now, there is no way.

Also, wouldn't it be more reasonable that both will exist?