$BTC is holding up much better than the SP500, at least for now...
Standard Chartered points to the relative strength of BTC amid the sell-off in risky assets and calls for holding long in it, calling it "protection against US isolation" in trade wars.
It is noted that there have been previous situations when BTC behaved strongly during the sell-off in the SP500 for some time, but then, eventually, "gave in" and fell much more strongly and faster than the SP500 (though at that time there was not such strong demand from ETFs, since spot ETFs themselves did not exist yet, and there was not such strong demand from corporations and institutions).