Bitcoin is not inherently anonymous. It may be possible to conduct transactions is such a way so as to obscure your identity, but, in many cases, users and their transactions can be identified
In many cases it can be identified not in all cases. Noob who don't know how to hide can be trace.
Same kind of reasons gave in your other article. Don't have time to quote all points what say it can be annoymous and so you must read carefully to understand what writer trying to saying.