Buying cryptocurumines is not an exception, in a global environment where privacy is constantly under threat. At the beginning of this market, since the number of users and exchanges was not important, the user identity formalities were not normalized. However, over the years, the situation has changed.
Many Bitcoin attracted the attention of non-printing users and the attention of diplomatic international regulators with encrypted risk SOURCE https://cointelegraph.com/news/how-anonymous-is-the-purchase-of-crypto-regulations-practice-risks
This is a very interesting read, truly tells you how much of it anonymous and what isn't.