A stock market forum can be powered by Punbb ?

Hello, I want to use PunBB to create a new stock market site (trading, etc.), but I am not sure about few points :
- Each company must be linked with a forum (under category "stocks") : that represent several thousands of forums... is it possible to associate a "tag" to a forum (the short name of the company, by exemple) to simplify the interface, and create a search & associate fonction ? Because scroll a list of thousands of forums seems to be totally crazy !
- Technically, PunBB can run thousands of forums whitout problem ?
- PunBB can allow more than 100 users online ?

thx