Coinbase expects spot Bitcoin ETFs to be approved by the SEC by the end of 2023, which could increase liquidity and price discovery. This approval would be a significant milestone for the crypto industry, leading to a surge of institutional investment. However, the SEC has not yet approved any spot Bitcoin ETFs due to concerns about market manipulation and fraud. Despite these concerns, Coinbase is optimistic that spot Bitcoin ETFs will be approved, opening up new investment opportunities for individuals and institutions alike.