The purpose of Ether, the cryptocurrency, is to allow for the existence of a market for computation. Such a market provides an economic incentive for participants to verify/execute transaction requests and to provide computational resources to the network.
Ethereum needs, however, to be greener. It's no secret that Ethereum and other blockchains like Bitcoin are energy-intensive because of mining. But Ethereum is moving towards being secured by ETH, not computing power via staking. One benefit for investors is they can receive “staking rewards,” similar to interest payments, from the upgrade. In this case, that works out to about 25% annually.
Regards,
V. Buterin
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