(Bloomberg) -- Provincial officials in Canada are trying to force the surviving co-founder of defunct crypto exchange QuadrigaCX to explain how he came by a cash hoard, 45 gold bars and jewelry including a diamond-studded Rolex.Most Read from BloombergBiden Gains Ground Against Trump in Six Key States, Poll ShowsLondon Insurers Face Baltimore Bridge Payouts Worth BillionsJapan Amps Up Intervention Threat as Yen Hits Lowest Since 1990Trump’s Net Worth Hits $6.5 Billion, Making Him One of World’s