Ethereum founder Vitalik Buterin has said that the blockchain may move to a low-energy system by 2021-end, a Bloomberg report said. The technology, called proof-of-stake, uses significantly less energy than the current proof-of-work mining process. The move is expected to reduce the use to 0.001% of that used in the proof-of-work process. The value of cryptocurrencies, including Ethereum, has been on the rise in the past few years. Experts say the technology move will reduce its impact on the environment. Buterin said that he was happy that the proof-of-stake will solve the current problem wit...