THE BLOCK: Datavault AI's stock DVLT plunged nearly 50% after the company said it has been unable to withdraw bitcoin:native maintained at Biconomy crypto exchange since June 2026. The bitcoin originated from a Sept. 2025 equity deal with Scilex Holding, under which Scilex agreed to buy Datavault shares and warrants for $150 million payable in BTC, which was credited via offchain transfer to the company's Biconomy wallet.