For those unaware, "hyperbitcoinization" means the adoption of Bitcoin at a large scale worldwide making it the standard (global) unit of account.
Just call it mass adoption so that there is no need to also give definition

In a "hyperbitcoinized" world, you would pay for anything using Bitcoin instead of Fiat.
Why "instead" of fiat and not "alongside" fiat? I don't think bitcoin will ever replace fiat, it also wasn't meant to replace it either. In mass adoption you will see almost every place accepting bitcoin payments just as they accept fiat payments, credit cards, etc.
And what better way than ditching Fiat in favor of Bitcoin?
I don't think it is possible to ditch fiat in the foreseeable future. We live in a centralized world and worst of all people are used to certain things that won't change that easily.
Although I agree that with the increasing inflation people will have another incentive to convert their fiat (part of it at least) to bitcoin to have a chance of surviving the increasing prices.