I am not speaking of Double spending. Many coins have been exploited by the creation of false coins and caught by the community via the explorer showing an obscene amount of coins directed to a single address. How can we be sure that is not occurring as we speak? This is a glaring issue that requires far too much trust when cryptocurrency is meant to be trustless. This is the exact opposite of the purpose of cryptocurrency.

As for proof I have none, because it is impossible to know, that being the issue. We have to entrust that everyone is playing by the rules, when we know that everyone playing by the rules is very unlikely. This is the Schrodinger's cat of cryptocurrency. Grin is neither exploited or un-exploited because we can not see inside the box, this is virtually us entrusting in the government all over. Funny how things come full circle, eh.