If you try to visit the link provided by OP, it is talking mostly on Bitcoin network itself, like how it is built or the technology behind it, just like what stompix said.

Regarding this question, most of these are just FUD, or they want people to panic.
If we talk about price, maybe we can say correction rather than crash, it is normal on the price ofcourse.

Additional, we can see the Bitcoin Obituaries here, how many they are declaring Bitcoin is dead - Bitcoin Obituaries - Bitcoin declared dead