I think guys like Draper are talking their book
It would take a monumental recalibration of the regulatory regimes in most developing nations for btc to really serve the under-banked
Your cell phone becomes your "bank" and
regulatory regimes are obsolete.
I understand the world isn't that simple, but when fiat keeps collapsing, then BTC can take over.
I read an article about Bill Gates stating that 9 African Countries currently use mobile bank accounts more than bank accounts.