If you use btc properly you can be fully anonimous with them
You can say that about any medium of exchange, though. Replace "btc" with "cash" in that sentence and it's just as true.
The media often talk about Bitcoin and throw around the word "anonymous." However, there is nothing inherently anonymous about Bitcoin, and unlike cash, if you screw up your anonymity measures with Bitcoin, there is a permanent record of it. Bitcoin is not really anonymous at all. In fact, it's the opposite. Non-repudiability is basically the opposite of anonymity, and it is much more the core of Bitcoin than anonymity.