On this week's Unhashed Podcast: a record $3.7 billion worth of Bitcoin options are set to expire, Bloomberg reports that Creditors seeking to regain Bitcoin lost on the Japanese exchange Mt. Gox in 2014 have a chance to get their digital assets back before legal claims are settled, Janet Yellen is testifying to become the new Secretary of the Treasury, new ads have been seen popping up with click-baity titles for the Grayscale ETH fund, former prime minister of Canada Stephen Harper said bitcoin could potentially see use as a reserve currency, but it isn’t going to supplant the U.S. dollar, thousands of illicit Bitcoin mining machines were seized in Iran, and we discuss a lingering spam attack vector on the Lightning Network.