Let's look at Bitcoin for what it is: a fundamental human efficiency improvement.
For some perspective, consider that financial activity consumes about 1/3 of the world's economic productivity (~USD30 trillion).
This is the quote I have the most issue with. You sort of compare what bitcoin can do by looking at total financial activity. Assuming your numbers are correct, they would account for things like bond purchases and loans whereas bitcoin can only properly compete with the deposit side of th equation.
People suggesting be your own bank with bitcoin forget that a bank is more than just a place to deposit money, its a place to get loans and access other forms of financial activity that bitcoin cannot or at least does not currently do.