I know that you can sell your bitcoin to trade plattform like coinbase etc.. BUT you need to verify your identify, so it' s not anonymously.
How do you cashout your bitcoins anonymously then?
Face-to-face cash through localbitcoins.com is pretty anonymous. It can be more expensive though because someone has to take the time to meet with you.
I think this is still not anonymous way because you will meet someone i think the only way to cashout bitcoin anonymously and withdraw into fiat i think bitcoin debit or credit cards there are some bitcoin cards you can anonymously withdraw and deposit your bitcoin..
Just sharing this link to see the list of debit cards and credit card support withdrawal world wide to any atm machine..
Check this updated thread
https://bitcointalk.org/index.php?topic=1242788.0But even using a method like that is not really anonymous, since you need to withdraw from an ATM and almost all of those ATMs have cameras in them so unless you are planning to look incredibly suspicious by wearing a hat or something you are going to be recorded when you withdraw the money.