What if the US Govt. buys circulating Bitcoin Supply and $ is backed by $BTC ?
They can't simply because circulating bitcoin supply is not for sale. Only a small portion of it is. For example I won't sell the amount of bitcoin I have accumulated to anyone least of all the US gov!
Hillary Clinton is alarmed by the rise of BTC.
Why should I give a rats behind?
Crypto was looked upon as some kind of a weird speculative currency/asset in the past.
Crypto (ie. altcoins) are pump and dump which is why they are looked down on.
With the rise of Defi's crypto is pretty much detaching itself from the Govt. and it looks like it cannot be stopped.
Wrong on both part.
DeFi is just another scam method to take people's money and it will stop on its own in near future when the hype goes away.
If the govt knew about crypto and its implications years ago they could have stamped it out. Now, it is too late for them.
They can at any time stop "crypto" that is centralized such as majority of altcoins. But they could never stop something as decentralized as bitcoin. Not in early days and not now and not in the future.
The US Govt has a right to be concerned because BTC is acquiring "trust" among the masses.
LOL.
Just like El Salvador, US could also try and capture the entire BTC circulating supply. And, if the US Govt. doesn't then Kremlin or other countries might.
You also answered your own question in second sentence. If one government does it, they will do it so "all circulating supply" won't be in hands of one gov.
So, the US Govt. can easily print out $1 Trillion Dollars which is not really all that much when you compare it to gold and then capture the entire circulating supply and use it as a reserve.
When governments print money, that money loses its value. So if currently they can swap 60000 of their paper money with 1 bitcoin, if they start printing more they soon realize that they have to swap 600000000 of their paper money for 1 bitcoin.
This is what has been happening for as long as paper money existed and is known as inflation. You usually see it in rising food, rent, utility, etc. prices.
Then they can pretty much make dollar reign in supreme again by backing $BTC to the dollar just like how they backed it to the gold standard in the past.
USD hasn't been backed by gold for a very long time and time for it to "reign supreme" is already up as the world is very slowly moving away from it.