BCB Group, a London-based crypto payments firm, has received a takeover approach from an unnamed investor while exploring a Series B funding round. The company, which previously raised $64.5 million across two rounds, including $60 million in a Series A round, is not formally up for sale. Investors in BCB Group include Foundations Capital, Pantera, Circle Ventures, and Digital Currency Group (DCG). No formal negotiations are currently taking place.