I didn't hear about Bitcoin Candy before and I thought first on a fake fork as I read their name. But they address a problem that should not be underestimated.
"Among the many questions about bitcoin, the rapid development of quantum computers is like a dark cloud far away from the horizon, which seems distant but disturbing."In "About" on
https://cdy.one/index_EN.html#homeInteresting would be, if they really have a solution.