I'm supportive of prudent innovation in the financial system, while at the same time concerned about banks engaging in activities that present a heightened risk of fraud and scams, legal uncertainties, and the prevalence of inaccurate and misleading financial disclosures.
As with any customer in any industry, a bank engaging with crypto customers would have to be very clear about the customers' business models, risk-management systems, and corporate governance structures to ensure that the bank is not left holding the bag if there is a crypto meltdown.