Agree. First things first. Countries worldwide would need to adapt blockchain to their existing infrastructure for a global currency to become a reality in the future. Considering how many have shift their views from Bitcoin and crypto, to the Blockchain, there's a possibility that the sole technology would take over every aspect of our lives in the future. An issue present nowadays which prevent a "One World Currency" to become a reality, is the lack of Internet access worldwide.
As such, the Internet needs to be accessible by anyone around the world, to help make a "One World Currency" (or Global Currency) powered by the blockchain fully adopted by the masses. The New World Order could use the blockchain for its own benefit, as it provides transparency, and reduces fraud and corruption. With a single blockchain, people could be conducting their transactions worldwide. Obviously, Bitcoin cannot be that "Global Currency" since it's decentralized and unfriendly to most banks and governments worldwide.
Nonetheless, the Global Currency needs to have the approval of governments, and banks worldwide, to become used as a standard (and only) medium of exchange for the people. Perhaps, the US Dollar would switch to a blockchain becoming the Global Currency. Or maybe, another currency such as the Euro or Yuan will take over the world. What matters is that Bitcoin has brought us such a unique technology (Blockchain) which will enable massive transformation of our economy, healthcare, lifestyle, and more. Just my opinion