Bitcoin is the most reliable digital currency that everything in the world today should move closer to, but the greediness and power in men won't let them.
I'd say your whole topic is painting an incomplete picture because you are not focusing on all the aspects.
It's true that bitcoin is the only decentralized censorship resistant currency in the world and has a high level of security and these things make it very reliable. But also there is a downside which is the volatile price, even though it doesn't make it unreliable but it is something to keep in mind. Which means it is not only "greed" and "power" that prevents bitcoin's adoption. There are other reasons too like the volatility.
Being decentralized is a part why the government should embrace Bitcoin in the world today, it's the only digital currency that can bring peace if allowed as a means of payment around the country.
If Bitcoin take that place instead it will be a smooth breeze, the government will have peace themselves, there will be no betrayer of sort because no one have power or control over Bitcoin.
First the economy has to change. Right now it is designed to work in a centralized way.
Look around the world and see what is going on.
For example in United States, ever since a year+ ago when the energy prices started to rise and caused inflation in US, the regime started battling it with increasing interest rates. But over the long run that means recession and at the same time the regime has to pay higher interest to US debt bagholders. They don't have nearly enough money to pay it (almost a trillion dollar), so the US economy either has to fail then and there or they have to print that much (remember the debt ceiling battle). Obviously the printed that much and dumped it on the market.
If they were using bitcoin, this would have been impossible.
What I mean by "economy has to change" is that you first have to give an alternative to what would the government do in the same situation where they can't control the energy price and it is causing inflation in the country that uses bitcoin. Or what would they do in a case like COVID19 pandemic when the economy is shut down and they have to print money to artificially revive it?
They can't print bitcoin out of thin air to artificially keep their economy alive, so what is your suggestion for that?