Does anyone have example of long term gov honeypot? Cloudflare and Facebook does not count as nobody asks "why they have not been sanctioned after over 5 years".
I don't know exactly how long encrypted ANOM phones existed but I think it was much longer than examples you mentioned.
Wikipedia article claims that initial device distribution was in October 2018, and they revealed themselves as Operation Trojan Shield or Operation Ironside three years later in 2021.
This is not cryptocurrency related, but it is related to privacy, and I think there ae more examples like this.
https://en.wikipedia.org/wiki/ANOM