We still need to believe and base it all on facts presented - I don't see it as highly likely to crash, and if it happens - well, then the rest of the market will be dead 
That's true, if Bitcoin goes, it will drag all the other cryptocurrencies with it. It'll be the end of a great era, but let's hope nothing like this happens.People are overestimating the chance of failure now. As more traditional interests get aligned with Bitcoin, they are not going to let something like that happen. They have the money, connections and infrastructure to prevent something like that from happening. In any case, a crash sub $10,000 would wipe out all altcoins with it too as you say.
I get what you're saying, but never say never, as much as it's possible for bitcoin to surpass $500,000 or even more, it's as possible for it to fall crashing down. Who knows, 5 years from now governments could start fighting cryptocurrencies.Don't get me wrong, I'm not trying to he pessimistic, but I want to be as down-to-earth as possible.