Coinbase’s (NASDAQ: COIN) Chief Legal Officer, Paul Grewal, on Friday expressed optimism about the Securities and Exchange Commission (SEC) approving a U.S. Bitcoin (CRYPTO: BTC) exchange-traded fund (ETF), saying that the financial watchdog will “fulfill its responsibilities.” “I’m quite hopeful that these [ETF] applications will be granted, if only because they should be granted under the law,” he said in an interview with CNBC. Notably, this comes at a time when the crypto realm is gaining significant attention, with events like Benzinga’s Future of Digital Assets conference on Nov. 14 prov…