‘Bitcoin will do to banks what email did to the postal industry.’ Rick Falkvinge
It works on anyone who remembers the days of letters and mail. Some people saw it coming but most were surprised by the effect of email on an established industry/service.
"I've seen transactions of over $100 million worth of value, executed securely in less than 10 minutes with no intermediaries , and for a fee of less than $5."
Another one:
"Bet against the global, open source, and tamper proof payments network if you like, but as for me I think it's wise to hold some."