After posting 15 extremely optimistic post, my bipolar nature leads me to this:
Should we really call BTSX 'A Bank'? I really do not think it is fair or beneficial.
After all a bank is a lending institution. All this mumbo-jumbo how it lends providing a collateral,.. just like a mortgage, is not really convincing and or cutting it for me. With a mortgage (and with most of the other stuff given as collateral) it is not money you give, it is something of value but usually not too liquid.
Additionally I am happy enough if BTSX is just a 'Beautiful' eXchange.