In response to this question, most of us choose Bitcoin,
No. You cannot generalize users of this forum to be choose bitcoin over fiat. Many forum members live in countries where bitcoin is a grey area and there is no market to spend owned bitcoins. For them, fiat is the only method to buy things they need.Quote
even the U.S. government itself,
The world is a lot bigger than only the US. 
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in my opinion, chooses Bitcoin because choosing Bitcoin means choosing a new blockchain economy.
Blockchain is a technology and bitcoin users a blockchain technology to keep its ledgers public and visible to everyone. The phrase "blockchain economy" should not be used like this because of bringing in altcoins to the picture which are not comparable to bitcoin.Quote
Even in this regard, the United States and China have made their national currencies digital, which makes us realize that the blockchain revolution is like a huge wave that even governments cannot stand against, and the emergence of Usdt and the digital yuan are some of its hallmarks.
How much truth there is to this sentiment is debatable. Countries want innovation and progression. The people running these government are way more intelligent than the rest of the population, even though some forum members might disagree. What they willing to do is regulate cryptocurrency and that will be for the good of the mid-low cap investors, which most users fail to understand.