Bitcoin dropped 3.97% to $76.5K as escalating U.S.-China trade tensions triggered a broader market selloff, wiping $186B from crypto markets.Ether plunged 8.36% to $1,454, marking one of its steepest daily losses this quarter amid fears of a prolonged trade war.The S&P 500 sank below 5,000, losing $5.8T in value in just four days, the worst rout in its history, highlighting growing investor risk aversion.The sharp downturn followed a 24-hour ultimatum issued by the White House, demanding China roll back its retaliatory 34% tariffs on U.S. goods.