Is this legal? (btc -> bitgild)

[2015Bubble]

Hello,
what if I buy gold with bitcoin from the site bitgild.com Is this transaction anonymous? I know they have your ID and stuff.
After that I have a nice bar of gold wich I will sell to my local goldstore wich pays in cash he also asking for my ID (why?).

So i'm now trading bitcoin to cash anonymously?
Is there a catch?

[Boelens]

Should be completely legal. They want your ID for records. You'll still have to pay tax and report it to the IRS or whatever equivelant for your country, but otherwise this is completely legal.

[mkc]

Should be completely legal. They want your ID for records. You'll still have to pay tax and report it to the IRS or whatever equivelant for your country, but otherwise this is completely legal.

If you can money, you can report capital gain; should you lost money on it, I am wondering if report capital loss, will IRS audit you, maybe just they are curious...