Hagens Berman Investigates Tezos (XTZ) Initial Coin Offering (ICO) and Notifies Participants of Class Actions SAN FRANCISCO, Nov. 21, 2017 (GLOBE NEWSWIRE) -- Hagens Berman Sobol Shapiro LLP is alerting crowdfund investors to the Tezos class action and the firm’s investigation into recovering the bitcoins...