EtherFi, originally an Ethereum staking protocol, has evolved into a crypto digital bank offering staking, DeFi yield, and Visa cards. Despite having only 21,000 users, EtherFi generates $256 in revenue per user, surpassing Revolut's $60, Wise's $83, and SoFi's $264 per user. The platform manages $9.9 billion in total user balances, averaging $470,000 per account. EtherFi achieves profitability from the outset through smart contracts and on-chain yield, bypassing the need for a banking license or traditional infrastructure.