Digital Currency Group is busy these days. In the last four months alone, the company acquired the biggest bitcoin news site, CoinDesk, and along with it, the biggest bitcoin conference, Consensus; it also gave money to Coin Center, the bitcoin industry's nonprofit advocacy group. On Thursday, DCG announced a laundry list of new investors and additions to its team, and among them is one very big name: Larry Summers. Summers, former Treasury secretary and former president of Harvard University, is joining DCG as a senior advisor. It is a reminder that Summers believes in the future of bitcoin, the crypto-currency...