A hack at a small Canadian crypto exchange left its users holding the bag Sunday, as MapleChange announced it had lost all its assets and would not be able to immediately refund its users. On Sunday afternoon, the exchange, which has Edmonton, Alberta listed as its location on Twitter, announced that a security breach allowed someone to steal all the assets it held. MapleChange added that it would not be able to refund the cryptocurrency until it investigates what happened. The hack followed MapleChange’s announcement Saturday on Twitter that it had upgraded its server and launched a version 2.0.0. https://twitter.com/MapleChangeEx/status/1056582662435954688 It’s unclear how MapleChange’s investigation is going, as the exchange…