SAN FRANCISCO--(BUSINESS WIRE)--DigitalTangible Inc, a decentralized gold, precious metals and bitcoin exchange rebrands under a new company name to broaden its investment platform offerings to global traders, investors, and merchants. Serica launches with a broader mission to provide smooth trading of any valuable, physical asset and digital money, in ways that were considered impossible or extremely difficult before today. Serica’s rebrand coincides with upcoming launches of its newest produc