I don't think so. The party is just getting ready to get started. Hang onto your hats... it's going to be a bumpy ride, but over time crypto currencies are going to change the world.

They appeal to too many people:

geeks
cyberpunks
anti-banking crowd
anti-government crowd
gold/silver bugs

... and furthermore, it just makes sense.

You may have missed out on being one of the first 'early adopters', but most people still don't know what btc is, and you're way ahead of 98% of the population.

Mark