The number of transactions in a Bitcoin economy can still be as large as it is today, but the settlement of these transactions will not happen on Bitcoin's ledger, whose immutability and trustlessness is far too valuable for individual consumer payments. Whatever the limitations of current payment solutions, they will stand to benefit immensely from the introduction of free market competition into the field of banking and payments, one of the most sclerotic industries in the modern world economy, because it is controlled by governments that can create the money on which it runs.
