@Sef***
I think the question is "checking account", an emergency fund could go in a high yield savings account, money market fund, or short term treasuries. Risk-free and instant access, but earning 3.5-4.2%. 4.2% of 6m is ~250k ($8,000), a lot to just pass up. HYSAs are accepted same as anything else for visa purposes so no reason not to. Maybe he gets decent interest on the current account.
6m ($192k) is probably not "6 months cash" for someone with a total of 68m. It's almost 10% of their investments, which is significant in percentage terms. If someone with under $2m invested is spending $32k/month they are living well beyond their means. Even people with $50-100m spend less than that on average.