Your 100% right about your analysis, there is a huge market for cryptocurrencies. The only way it could vanish completely is if people stopped using cryptocurrencies completely and that's not the case. There is still a huge demand in the market and yes it's only going to get bigger as more and more people find out about how cool it is to use cryptocoins for themselves.
Once they realize it's not the end, that it's only the beginning they will buy back in and we can continue into the future of barter together.