Is it the reason, why bitcoin price goes down? Or does it mean the end of one of main bitcoin's principles - anonymity?
not this news
and also i'm 100% agree with this
But Bitcoin has lost the anonimity long time ago with new regulations for exchangers. To be able to trade there you have to register with your personal data according to anti money laundering and anti terrorism laws. So, your data are also available to law enforcement agencies if they ask exchangers for delivery. Today there are also other tecniques to identify the Bitcoin owner so full anonimity doesn't exist.
This database might be difficult to exist in the light of the new EU GDPR directive but we'll see.
and that's why full anonimity doesn't exist anymore
Even if they have the name of a user, how can an EU law enforcer prove that an XMR or Zcash transaction made by that user is really his, or how can they find the transactions they are looking for in XMR or Zcash lol.
Maybe XMR, Zcash and Dash are the future.