Entirely possible. Maybe not for RDJ, but definitely possible for a random poster on FT. Chase is hyper-aggressive in shutting down checking accounts for a multitude of reasons, including but definitely not limited to the following:

Too many "large" cash transactions (deposits or withdrawals)

Accessing a safe deposit box too frequently

A business customer legally operating in an industry they do not like (porn, gambling, firearms, legal marijuana retailer, etc)

A personal customer known to be employed in any of the above industries