A small flash crash struck the broader market at about 1:10 p.m. Beijing time, with Bitcoin, Ether and multiple altcoins recording sharp intraday wicks. Oil and other non-crypto assets also experienced brief, violent volatility. Jiang Zhuoer, founder of B.TOP, warned against holding large, highly leveraged altcoin long positions in a unified account using cross-margin (shared collateral across positions). If one token suddenly falls 50%, the resulting margin shortfall could force the liquidation of other assets in the account. He recommended isolated margin (collateral assigned to one position), which limits the impact of an extreme move to the affected trade, although it is less convenient to manage.