They said the same thing when internet itself got made public for normal people in the late 1980's, i watched it first hand. I was running several BBS's back in that time, and also telnet BBS's. mmmm. Good old memories. And look at internet now. 

They said the same thing about VISA credit/debit card when they created that card in 1958. NOBODY would ever use it, they said; it was madness to trust a piece of plastic with unprotected numbers on it! Look at the growth of creditcards now. (Now I personally still think its madness to trust a creditcard with unprotected numbers like VISA tho, but the world seems to ignore that. Bitcoin will solve that problem once and for all)

They said the same thing with Paypal too. Who would trust a private owned non-bank corp for payments. Look at the growth of paypal now.

Same with bitcoin today. But within few years when enough web-sites has adopted it, rest assured, it's unique way of working will make sure it will be a highly popular way to transfer money. Unless we in future somehow discover a insane bug in the protocol which opens up for a major security-breach, bitcoin is here to stay.

Period.