How do you resist strong naysayer arguements

[m4552669]

After having watched this - http://www.youtube.com/watch?v=9U3c6WlMIu0   I cant help but question my bitcoin convictions a little bit, still a newb within the community with no experience apart from holding bitcoin as an investment vehicle, how would you guys respond to the statements in the above vid? do you think he is absolutely wrong on all accounts?