What is #bitcoin address reuse?

[via nostr:npub10qrssqjsydd38j8mv7h27dq0ynpns3djgu88mhr7cr2qcqrgyezspkxqj8 with nostr:npub1cj8znuztfqkvq89pl8hceph0svvvqk0qay6nydgk9uyq7fhpfsgsqwrz4u and nostr:npub1j5mp526z5fkz9wkrk6mt5nzu43xndyrwkr8mnqngdqwytgcpc5vqcnsd5c]

https://fountain.fm/episode/mIdQ28H0ZyAHcwhwQEBl
https://nostrcheck.me/media/633060d97076f9d00e9d57b912ab5b7c75be562e465951c2cbc4d6de110d9d73/3087145e2eb855003ea86a74018688e5287ce1e83b2abf2bd200917e2b50b01f.mp4