Serenity, which is the fourth stage also the final form of Ethereum, is what we often call Ethereum 2.0. The biggest change in Ethereum 2.0 is to introduce Beacon Chain, Shard Chains, and convert PoW mining to PoS mining. Among them, the consensus change from PoW to PoS is the top priority of the Ethereum 2.0 upgrade. This article attempts to explain three things as follows, hoping to bring you more perspectives, so as to better grasp the investment opportunities in the new situation:The deve...