Is this FUD or something to be concerned about? 
Discussion
Maintaining privacy is something to be concerned about. nostr:npub1v6qjdzkwgaydgxjvlnq7vsqxlwf4h0p4j7pt8ktprajd28r82tvs54nzyr and nostr:npub1nccwjspr3nv7h67xx2qhdh2dzzvpyy55gte2dsu8yl7xd7n74y9qydz7mj might have suggestions.
It is not FUD, that's exactly how bitcoin works and what many of us are working to minimize improve for users
It's worse than you think. Every time you spend BTC the change is returned possibly to a new or separate change address. This address is now linked back to you. Also if you spend from multiple inputs, it can be assumed that all the addresses also belong to you further increasing the amount of information that can be collected. So knowing one address you can link and track all the other addresses you control. Once a symbol of freedom, now dominated by big capital, surveillance, centralization and controlled by big money and governments, Bitcoin has strayed far from its roots. It is not going anywhere anytime soon but at the same time it is not the peer to peer digital cash as Satoshi had envisioned. A quick example - all my favorite breweries that once accepted BTC no longer do so, slow transactions, high fees, tax compliance......