user59049: Is there an intrinsic reason why cryptocurrencies currently take a lot of energy to keep working? Is there a way to make a cryptocurrency still widely used but make it energy efficient?

user5257: As the answer for this question, we have the Proof of Stake approach, firstly implemented by Peercoin (PPC). I think other coins as Ethereum have as well a proof of stake mining/minting approach
links: https://peercoin.net/minting and https://github.com/peercoin/peercoin/wiki/FAQ

59049: <p>Is there an intrinsic reason why cryptocurrencies currently take a lot of energy to keep working? Is there a way to make a cryptocurrency still widely used but make it energy efficient?</p>
 5257: <p>As the answer for this question, we have the Proof of Stake approach, firstly implemented by Peercoin (PPC). I think other coins as Ethereum have as well a proof of stake mining/minting approach</p>

<p>links: <a href="https://peercoin.net/minting" rel="nofollow noreferrer">https://peercoin.net/minting</a> and <a href="https://github.com/peercoin/peercoin/wiki/FAQ" rel="nofollow noreferrer">https://github.com/peercoin/peercoin/wiki/FAQ</a></p>
