The CEO of a $15 trillion Wall Street giant just called traditional finance “really kind of scary.” Abigail Johnson, who runs Fidelity, says the current financial system is the most complicated web of basically reconciliation processes built on “primitive technology” — and that blockchain will eventually replace it. But it won’t be an easy path. “It’s got to be an evolutionary process and it’ll be some combination of competitive forces and regulatory standards that will kind of push it kicking and screa ...