Although for me that's okay when it happens, but most of them will disagree with what you mentioned, because what we're talking about is now, so whatever we say will happen in the future, it will remain just a speculation . So it's up for debate until it happens, right?
The dollar will continue to exist, just like any fiat, but it will not be the dominant currency in the world economy, meaning that the global economy will be disengaged from the dollar in favor of another currency, perhaps the euro, the yuan, the BRICS currency, or bitcoin, no one knows.
Of course, these remain just speculations and wishes and do not necessarily materialize on the ground. I wish bitcoin would be the global currency to replace the dollar.