Ethereum 2.0 is a separate Blockchain that communicates with the Blockchain Ethereum. In particular, it will be in charge of managing the Proof-of-Stake and sharding component of the Ethereum network. Thus, the current Main Blockchain (Eth 1.0) will continue to operate via the Proof-of-Work in order to continue to ensure a high level of security during this transition period. Once the Ethereum 2.0 chain is implemented, ether holders will be able to migrate their ethers from the current Blockchain to the new Blockchain