If Bitcoin crashed and burned would it most likely be the end of all Crypto currency ?
I dont think cryptocurrencies are going away at all. This technology will soon be woven into the fabric of cutting edge technology. We have altcoins that are being used for smart contracts, IOT applications, communications, etc.
Even if Bitcoin didnt survive for some reason, there is a place for this technology in the future. If anything, the reason that Bitcoin could fail is because of newer and better cryptocurrencies that solve some problems such as scalability and high fees.