Geopolitically there are two divergences when it comes to the question of reserve currency. USA is trying de-dollarize by taking the route of BTC and crypto, in fact, BTC and crypto was a project started in USA amid the crisis of 2008 and for the first time USA itself wanted deDollarization.
BRICS nations are trying to dedollarize by taking the route of GOLD. You must have been hearing why Central Banks are heavily buying GOLD.
That said, USD is not going anywhere but the world will no longer remain uni-polar and by 2030 we are heading into multi-polar world order. Geo-economics is always embedded in Geopolitics. India has already started trading in INR in ASEAN countries, Russia and UAE. And that will further expand.
In time, when Global South does away from USD as an international currency or at least curtails its use, USD will lose value slowly relative to the local currency of respective nations(particularly resource-rich nations and manufacturing hubs). It will be a long-drawn process, but by 2030, you will begin to see the visible impacts of it.
The creation of Euro was the first de-dollarization even and that led to dot com bubble. The creation of BTC was the second passive attempt of de-dollarization under the guise of deflationary currency. To some extent, it is so. But geopolitical reading perfectly connects those dots.
Thank you.