Jiang Zhuoer, founder of the Liebit Mining Pool (B.TOP), warned that a sudden 50% drop in one cryptocurrency could trigger forced liquidation across a trader’s account under a joint margin model (shared collateral across positions). His comments followed a flash crash around 13:10 Beijing time today, when BTC, ETH and various altcoins recorded significant price spikes and crude oil also experienced short-term violent fluctuations. Traders using high leverage on altcoins were advised to use isolated margin (separate collateral for each position), which is more cumbersome but can limit losses to one position rather than expose the entire account to liquidation.