Who knows what happened for sure wrt nostr:npub1hcwcj72tlyk7thtyc8nq763vwrq5p2avnyeyrrlwxrzuvdl7j3usj4h9rq, but here’s what seems likely to me:

Either Wallet of Satoshi got spooked from the recent $4B Binance fine, or they got a call from a 3-letter agency, or both.