Looking back from the 2025 milestone, the integration of cryptocurrency with national sovereignty is no longer a fantasy. Over-collateralized stablecoins like USDD essentially build a "code-driven central bank framework." If a country truly adopts it as legal tender, it means voluntarily relinquishing the power to issue unlimited paper currency, but in exchange, it would undergo a complete rebuild of the international credit system. Think about it—all collateral assets (such as BTC, TRX) are on-chain and transparent, and this transparency itself is the best signal for financing—investors can see the financial health at a glance.

The more radical aspect lies in the change of the financial power structure. Ordinary people will no longer hold depreciating paper currency every year but will have access to real assets directly connected to the global DeFi ecosystem. Saving can automatically generate interest, transfers are instant and nearly zero-cost—equivalent to a leap over a century of financial infrastructure, directly entering the era of digital civilization.

But risks are also evident. Governance of such stablecoins still bears traces of centralization, entrusting monetary policy to code and global node operations. When a financial crisis occurs, it could trigger more complex chain reactions than traditional financial systems. Coupled with the counter-pressure from the traditional international financial system, this is no small matter.

Ultimately, this is a high-risk experiment. But for economies on the edge of the global financial order, it might be the only chance for a turnaround. If stablecoins truly evolve into a country's legal tender, that will be the ultimate test: in the digital economy era, whether the transparency of code can finally surpass political promises and become the most credible asset backing of a nation.