U.S. Treasury Secretary Janet Yellen reiterated at the Davos World Economic Forum that the Biden administration is willing to use tariffs as a primary geopolitical tool. This statement has triggered a surge in global market risk aversion. It has once again raised concerns about trade-induced inflation, causing Bitcoin prices to fall below $90,000, Ethereum prices to drop below $3,000, and investors to reassess macro risks. Yellen warned Europe not to retaliate against U.S. ambitions in Greenland and indicated that the U.S. might impose a 10% tariff on Greenland before February 1st.