I don't think a bitcoin price ticker is really something that needs to be implemented that would just be putting unnecessary load on the server which you could just looked at another website in another tab.
Load?
Its not going to make much of a difference compared to the queries you have to make to display posts and categories and what not.
I'm not very in the know for this kind of stuff but its not a priority and not something that is really needed and I think I'm right in saying that it's a extra possible thing to consider for security issues and also it will eat some resources.
It would only take a few minutes to implement in the new forum software, have no effect in security, and take up almost no resources.
It doesn't have to put any load on the server if it uses a remote API and Javascript.
