Bitcoin fell below the $63,000 level during Asian trading hours, extending overnight weakness as tariff policy changes and artificial intelligence concerns dampened investor sentiment. The world's largest cryptocurrency by market value was trading at about $63,485 at the time of writing and is now down 7.2% for the week. Prices are hovering near levels last seen on Feb. 6, when the token nearly dropped to $60,000. Market participants linked the move to broader risk-off behavior across financial assets. US stocks declined after President Donald Trump said he would impose temporary 15% tariffs on imports, raising the rate from the 10% announced earlier following a Supreme Court decision that struck down his previous tariff strategy.