WordPress has no limitations
No. WordPress is not just a blog engine. Using it the right way, with the right tools, it opens new dimensions, however it still remains WordPress. Easy to use.
WordPress is secure
A properly updated WordPress website, on the proper hosting is safe and secure, however you're better to have some security tweaks and tools set up. This can be a game changer.
WordPress is blazing fast
WordPress as a CMS runs really fast on the right environment. You can slow it down with a sluggish template, bad quality plugins, or a not optimized hosting solution. You should believe there is much more in it.