Yeah it is good to use crypto for the transaction usage but it is not in short time to switch people into that method of leaving. Cause some of them are didn't know about crypto, they just know Fiat or other currency. We can not force them to switch cause people perspectives if they can hold and see their fiat an they felt that is an tangible for them.
It's just about the beliefs and thoughts of some people who don't know crypto, so they often think that state or fiat currency is real currency and they don't consider anything else as real. In fact, the number of crypto currency users continues to grow from various backgrounds and I think those who don't believe in this can also find out for themselves by looking through true and accurate news. Even though they have basically never used it even for transactional matters or the like.
Yes, gradually everyone will know crypto, especially bitcoin. And actually most people use crypto only to store value or as an asset and also to invest not to transact.
because crypto has not been accepted by the government to be used for transactions and it is this problem that makes no sellers use crypto because fiat is still a reliable transaction for everyone. So it's not as easy as the OP says even though the main purpose of bitcoin or crypto is for fiat replacement transactions, and that still takes a very long time.