I think the scale of the transaction is the key to whether or not using Bitcoin makes sense for the exchange. An eight dollar transaction fee on fifty thousand

I think the scale of the transaction is the key to whether or not using Bitcoin makes sense for the exchange. An eight dollar transaction fee on fifty thousand dollars is an acceptable amount but that same fee on a coffee makes no sense. It's roughly akin to trying to pay for everything with 100 dollar bills (The out of print 10,000 dollar bills would be an even better comparison). It's still a valid medium of exchange but it's not really appropriate since it's such a hassle to do.