Bitcoin may be the only digital currency that can circulate globally. In the current global financial turmoil, digital currencies have undoubtedly ushered in widespread expectations for civilian use. As a 'new currency', the potential of digital currencies is constantly being amplified, whether for payment, value storage, or hedging. However, please note that this 'vast usage scenario' is basically limited to the civilian level. For countries, the situation is completely different—especially for sovereign digital currencies represented by the 'digital dollar', which cannot be massively incorporated into the foreign exchange reserve systems of other countries. Why? Because the control of the digital dollar is entirely in the hands of the U.S. government. Once held, your 'asset' is essentially just a string of numbers recorded on servers in another country. If the U.S. chooses to impose sanctions or freeze accounts, it doesn't even need a judicial process; it can simply operate with the click of a button in the backend. In contrast, physical dollars can at least be 'stored in a vault', possessing a certain degree of physical sovereignty; while the sovereignty risk of the digital dollar is fatal—entrusting most of a nation's wealth to foreign hands is akin to tying one's own hands and waiting to be slaughtered. Even if the U.S. government does not easily abuse this power in the short term to maintain 'credit', this technical absolute control itself is seen as a 'major concern' by central banks worldwide. This applies not only to the U.S. but also to any country intending to internationalize its sovereign digital currency. Against this backdrop, Bitcoin has become the only option for 'non-sovereign digital currency'. It is not controlled by any government, has a constant supply, is decentralized, and its assets cannot be frozen. Therefore, in the future digital currency era, if there is to be a truly globally accepted and transnationally circulated form of currency, it is very likely to be neither the digital dollar nor the digital yuan, but Bitcoin itself.