Denatacoin Foundation also offers a preventive dental insurance model, based on smart contracts, exclusively using DCN as a payment method.
I started taking surveys at Dentavox and using their token at the beginning of the current year, although with the pass of time the number of surveys available became less and less. The games in the Dentacare apps are entertaining and useful to learn about oral care and improve our oral routine, at the same time that you collect DCN rewards.
If the project expands, I think the Denatacoin token has a good long-term future. I advise to collect these tokens, although I wouldn't recommend buying them.