28 April 2020Overstock.com (OSTK.Q) subsidiary GrainChain wins World Changing Ideas AwardJoseph Morton OSTK.Q GrainChain, a keiretsu company of Medici Ventures, the blockchain subsidiary of Overstock.com (OSTK.Q), has been honoured as one of the 18 finalists of Fast Company’s 2020 World Changing Ideas Awards…