Comparing Visa transactions to Bitcoin transactions is definitely comparing apples to oranges. A Bitcoin transaction on the blockchain is layer 1. A visa trans

Comparing Visa transactions to Bitcoin transactions is definitely comparing apples to oranges. A Bitcoin transaction on the blockchain is layer 1. A visa transaction is layer 3 or 4? Lightning network is layer 2 and you could have >700,000 transactions in a lightning channel before settling on chain, so there you go Bitcoin layer 2 is more energy efficient than the common financial system layer 4.