But that doesn't necessarily mean that cash will go away, I think people are attached to cash a lot and it's a different feeling when you have cash.
In my opinion, your opinion is true. Why ? Indeed, cryptocurrency is now much interested, some people consider cryptocurrency as a valuable asset to them. but cryptocurrency has one weakness that is not the official currency. cryptocurrency is just a virtual currency in the digital world. so this is where another function of cash is to be a medium of exchange for cryptocurrency, so the selling value of cryptocurrency can be used for in the real world.