[rspeele]

Your first point kind of makes it impossible to call anything a waste, right? Everything we do in society is paid for by somebody so it must all be worthwhile.

For the second point, are you talking about Layer 2 solutions that track cryptocurrency in a centralized database, like an exchange, where most transactions happen? Basically just traditional banking but with crypto as the unit of account. Or are you talking about decentralized layer 2 solutions like Lightning Network? I don't think Lightning Network can scale to match what the banking sector does, even if you ignore all the services banks provide other than facilitating transactions. For example you could not pay the US workforce with Lightning Network because it would take several months worth of of blocks just to open a channel to each person, and quickly those channels would run out of inbound capacity and you'd need to open more on top of that, so the Layer 1 capacity still limits the ability to use LN at that scale.

[patricius]

Maybe Lightning Network will scale, maybe not. But VISA or Mastercard could build on top of Bitcoin and allow many more transactions than the base layer does. You would use the base layer for final settlements.

Already now you can get a VISA/Mastercard and use that to spend Bitcoin. But of course, every layer on top of Bitcoin presents its own set of trade-offs in terms of trust and security.

What constitutes waste is completely subjective.