Bitcoin slid under the $68,000 level in U.S. morning hours Thursday, extending a week-long selloff that has tracked weakness across global risk assets and deepened concerns about near-term downside. Crypto liquidations exceeded$1 billion over the past 24 hours, wiping out about $980 million in bullish leveraged bets as the slide forced traders to close positions they could no longer keep funded. The price fell below$70,000 earlier in the day, with liquidity heatmaps pointing to further downside. (Coin ...