Ethereum's transition to Proof-of-Stake (PoS) is being questioned for its value proposition.The shift from Proof-of-Work (PoW) may have cost the network an estimated $1 trillion in value.Meltem Demirors, Chief Strategy Officer of CoinShares, believes PoS weakened the Ethereum network and resulted in a missed growth opportunity.Concerns have also been raised about Ethereum's economic viability and its long-term appeal as a store of value.