Odaily Planet Daily News: Nubit founder Yu Feng stated at X that many protocols in the current BTCFi ecosystem are faking lock-up through offline pre-signed transactions. This method does not truly lock Bitcoin on the mainnet, but instead creates a false impression of being 'locked up.' Users can submit multiple pre-signed transactions using the same UTXO, allowing multiple protocols to count it as TVL, but in reality, this Bitcoin is not locked anywhere at all. This practice leads to a false inflation of TVL and serious trust issues. Founder Yu Feng proposed two solutions: first, to truly put transactions on-chain by locking funds through Bitcoin script addresses; second, to design using zero-knowledge proofs, making the lock-up both transparent and secure, avoiding double-spending risks.