Other witnesses have told us that, to have access to the bitcoin's value, an individual needed to have a bank account. People can keep bitcoins in a wallet, as you are saying, but if they want to use that money in their daily life, they need a bank account. At the end of the day, it can be traced back to a physical person with a real last name, first name and address.
On March 19th, 2018. See this statement in context.