Not all cryptocurrencies are proof-of-work, which are the ones that use lots of energy.
EDIT: PoS is a dumpster fire. But PoW and PoS are not the only games in town.
EDIT: PoS is a dumpster fire. But PoW and PoS are not the only games in town.
Why make alternative finance systems based on the same fact that the wealthiest entities control the policy of the network? Exactly like in the current system with central banks and governments.