I think, when the world's electricity supply is still large, and has reserves from every source, the world's electricity will be able to handle bitcoin.
in addition, the development of electricity is never stopped, the innovation of electrical energy from various sources has always been used to save world electricity, such as hydroelectric power, solar power, waste power, and steam power.
Electricity consumption is indeed a matter of bitcoin, unlike paper money. Bitcoin transactions and mining are very wasteful of electricity, but the solutions offered are not all able to solve the current problem. Maybe one day renewable energy can be a solution, because fossil energy will one day run out. If don't find an alternative and fossil energy runs out, bitcoin ends because the internet cannot be used without electricity.