Redditor @Austinwolfman posted a picture that showed his dentist was willing to accept Bitcoin for payment and would give a 20% discount on all services to those that paid with the coin.
Deurstopper responded to the post by asking, " What about Dentacoin?," which was a real thing. Biba8163 then stated, “4 out of 5 dentists recommend you pay with Dentacoin. This must be the straggler that accepts Bitcoin.”
Dentacoin is famously known for going from a $20 million market cap in December 2017 to a $2 billion market one month later in January 2018. Dentacoin did not have much if any, public adoption among dentists at the time.