The complexity of the attack increases as the perpetrator would also need to crack a second layer of hashing to obtain both necessary hashes. This strategy could be deemed economically feasible if the unspent transaction output (UTXO) contains a sufficient number of satoshis (sats), the smallest unit of bitcoin. This scenario underlines the need for robust security measures in the design of cryptographic schemes and highlights the importance of evaluating potential risks and rewards from the perspective of an attacker.