Your payment history works the same way, except the line behind you never goes home.
Some background first. Every time you pay with a card or an app, a record is made: who you paid, how much, when, and often where. Banks keep those records for years. Rules in many countries tell banks to watch for unusual patterns and report them. That watching is called transaction monitoring. Most of us never voted on how much of it there should be. It grew one rule and one reporting limit at a time.
A year of those records can tell a stranger a lot. A monthly payment to a counselor. A visit to a fertility clinic. A retainer paid to a divorce lawyer. A donation to a cause your boss dislikes. Each one is legal. Together they read like a diary you never meant to write.
My claim is this. Privacy in payments is not about hiding from the rules. It protects you from two specific harms. The first is being cut off from your own money without a hearing, because a pattern looked odd to a computer. The second is surveillance that runs backward: records kept forever and searched later, by people and for reasons that did not exist on the day you paid.
There is a serious case against me. Monitoring catches real crime. It has helped stop trafficking, fraud and money moving around sanctions. People who break the law do use privacy tools, often more than anyone else.
So I will tell you what would change my mind. Show me that broad monitoring catches crime in proportion to what it costs and how many ordinary people it sweeps in. Then show me that someone who gets cut off by mistake has a fast, real way back in. If both were true, I would worry a lot less.
I have been mining Bitcoin since 2015, and this side of it matters to me. Bitcoin is not perfectly private, since its ledger is public. But nobody can freeze your keys or close your account without a hearing, and you decide what you share and with whom. That is the same courtesy we want at the pharmacy counter: tell the people who need to know, and keep your voice down for everyone else.
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