According to CoinMeta, as the U.S. nuclear umbrella gradually weakens, allies are beginning to reconsider whether they need to possess their own nuclear weapons. Analysts point out that President Trump's latest defense strategy does not explicitly mention the expansion of deterrence, which has prompted allies to increase their own defense spending. This change has led more countries to consider the possibility of acquiring nuclear weapons, increasing the risk of nuclear proliferation. French President Macron announced an increase in nuclear warheads for the first time since 1992 and pledged to extend the nuclear umbrella to other EU countries. Meanwhile, Japan has also taken additional measures in nuclear defense, with Prime Minister Yoshihide Suga not ruling out the possibility of revising Japan's three non-nuclear principles. All nuclear-armed nations, including the United States, Russia, and China, are continuously modernizing and expanding their nuclear arsenals. Researchers warn that this may lead to an increased risk of misjudgment.