Ethereum (the 2nd most popular cryptocurrency system) is planning to switch to using both sharding and proof of stake instead of proof of work within the next f

Ethereum (the 2nd most popular cryptocurrency system) is planning to switch to using both sharding and proof of stake instead of proof of work within the next few years, which will solve the problems of high electricity usage from mining and high transaction fees. Ethereum is a cryptocurrency, but the system also supports tokens which are like other cryptocurrencies on the same blockchain. The DAI token on the Ethereum network is a decentralized stablecoin, pegged to stay at the price of $1 through a smart contract that automatically manages collateral to maintain the peg. The DAI token can be used as a cryptocurrency without the price fluctuation of Bitcoin or Ethereum.