A week after the Securities and Exchange Commission (SEC) dished out massive fines and closed a prominent “decentralized” exchange, its chairman is dashing hopes for Bitcoin Exchange Traded Funds (ETFs) one more time. Speaking at a recent conference, chief US financial watchdog Jay Clayton said he is not convinced digital asset markets are free from manipulation, so blockchain bigwigs should probably cool their jets. After prefacing his views with disclaimers, Clayton noted the market-wide lacking of adequate market surveillance and ‘head-scratching’ security breaches as primary contributors to his distrust of cryptocurrencies, reports CNBC. “What investors expect is that trading in the…

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