Should the unsold coins in this project be burned to climb their coin prices in the future because they are rare and few. But it all depends on the team's thinking to make further developments.
I agree that burning will have a positive effect on the economy.
But the main breakthrough will be when the first investors receive bonus bracelets. Why should we wear a regular bracelet if we can wear a gym ledger?

That right, It's very good if unsold coins are a bonus from investors who buy these coins when presale runs or token sale runs. There are several projects that do this.