http://whirtorrgetftvz4g466sjqkegtyi35bjl4bvotfkfossunf5my4x6ad.onion/blog/bitcoin-privacy
These can, however, change often, which means that unless you use services of providers such as Bisq, which is a non-KYC, anonymous bitcoin exchange, you might need to be very conscious of which exchange or brokerage you use. Last but not least, the peer-to-peer market is pretty strong for Bitcoin. There are countless different groups and chat rooms where people trade their bitcoins for fiat without any need of proof ID.