I first got into bitcoins about 2 years ago. Since then I've lost count of the number of times people have written it off, for the price (and adoption) to continue growing. We have the same old comments here I read 2 years back, but just a bit more bitter that they didn't buy a few hundred back then rather than writing it off.
Back in 1996 when I was working for one of the UKs first internet companies I lost count of the number of times people told me the internet/www was "just another CB radio-type fad".
Just like the internet Bitcoins offer something new... An ability to do things that weren't possible before. Much of the world has no access to banking for example. As bitcoins become more widely accepted I could make payment to someone in Africa direct to his mobile phone, even if he has no credit card, no bank account, no paypal. Virtually zero fees, no currency conversion required.Numerous other opportunities spring to mind.
Some people will alway write off innovations just as they did with the internet.