To make it effective you'd need to prevent the charity from cashing out. Perhaps make a dividend-paying instrument by continually re-loaning the base currency a

To make it effective you'd need to prevent the charity from cashing out. Perhaps make a dividend-paying instrument by continually re-loaning the base currency and taking the interest payment and converting them into a stablecoin which gets paid to the charity, but with no way to redirect the payments or convert it into a lump sum.