It could happen in many people's lives, but I still don't think that physical money will be forgotten by many people even though one day cryptocurrencies can replace traditional transactions that are often carried out by fiat money.

Until now I only thought that cryptocurrency was just an additional currency that could be used by many people in ways and methods that were different from fiat money. So what you are asking is indeed very possible, but to replace physical money, the progress of cryptocurrency needs to cover every corner of the world, including remote areas that currently still rely heavily on fiat money.