Banco Santander’s Openbank debuts crypto trading in Germany, expanding soon to Spain and the EU. | Credit: Getty Images. Key Takeaways Banco Santander, Spain’s largest bank, has launched retail crypto trading in Germany via its digital arm, Openbank. The service allows users to trade Bitcoin, Ethereum, Litecoin, MATIC, and Cardano, with more assets to follow. A rollout in Spain is planned by the end of the month, with EU expansion set for later this year. Banco Santander, Spain’s biggest bank and ...