What are the potential implications of Ethereum 2.0's transition to proof-of-stake consensus mechanism on network scalability, decentralization, and energy efficiency, and how might it impact the overall adoption of #DeFi applications in the crypto space? 

 Vitalik and his gang will mint 90% of the ETH. Proof of stake is a scam. Additionally, there are various attacks that allow double spending. Those can only be solved by centralized verifier servers. Proof of stake = magic bean yid scam to be exploited.