Is primarybiliary scerosis dangerous?

Extremely. Once the diagnosis has been made, you need to be followed closely by someone with a specialty focus on this. It is fairly treatable, and often lethal if it isn't treated effectively. Consider a second opinion, as this is for life. If confirmed, be brave and continue to proactive approach to your health that you've begun here. Good luck.
Yes and No. The chances of liver failure from primary biliary cirrhosis is dependent on how scarred your liver is. Although the name of the disease suggests cirrhosis- all patients do not have cirrhosis.