I wonder if it has anything to do with the currency apparently being backed by an immense reserve of oil (proven to the world by this year's geopolitical events), then coal, and then a massive amount of renewable solar, hydro, wind kWh's and infrastructure to deliver it to homes and shops.
More and more it feels like a nation's kWh throughput is the new metric to track its global influence in manufacturing, industry, and financial services. In other words electric power now equates to global power.
The more interconnected the grid gets, the more true this becomes.
I've always sort-of-joked[1] about a "Blood Standard": your status as reserve currency is proportional to the percentage of the world population your nation can murder in 12 months.
Puts a hard floor on nations with strategic nuclear deterrents - they can never fall below a fairly high threshold, no matter how much of a "Security State Zombie" their national economies have become.
[1] I'm not 100% sure it's all me joking anymore.