There are quite a few ways a privacy coin can be used, based on the type of coin you're using. Let's look at some common examples.
One of the primary ways in which a privacy coin can protect the user is via the process of'stealth addresses. When an individual purchases cryptocurrency, a new account is created and affixed to the transaction, making sure it cannot be tied to a wallet that is digital.
Another way to protect the user's information is to use"ring signatures. If you are using digital signatures to verify transaction data, it will be entered into a ring with other signatures of other signers, which means you won't be tracked. The possibility of collective immunity is that there are a myriad of possibilities.   hackernoon.com/meet-the-best-privacy-coins-in-2021