How does Bitcoin's energy usage scale?

A frequent point of criticism is the high energy usage that comes with Bitcoin mining. Advocates of Bitcoin point out that the existing banking system also uses a lot of energy and that Bitcoin mining is / could be powered by renewables. However they fail to answer the most basic question which is implied by the original criticism: How does the energy usage scale as a function of

the number of transactions,

the value of a Bitcoin,

the total amount of Bitcoin mined so far,

the share of Bitcoin transactions of all financial transactions,

the total amount of power produced in the world,

the world economy as a whole?

Or in other words: How much energy will we need to consume if the whole world runs on Bitcoin and layer-2 technologies are widespread?

I think these questions are important to see if that angle of attack of bitcoin bears any merit at all.