Bitcoin and major cryptocurrencies took a nosedive after former President Donald Trump announced new tariffs targeting 185 countries.The move triggered a widespread market selloff, wiping out $2 trillion in equity value.Nasdaq 100 futures plunged nearly 900 points before stabilizing, while Ethereum crashed 4.5%.Resistance to Trump's tariff policy is mounting in Washington, with bipartisan efforts to curb emergency tariff powers facing uphill battles.