When a digital currency is mined before it’s released to the public, that may be a symptom of a scam – but it doesn’t prove without a doubt that it’s a scam. It may be an indicator that the creators just intend to boost up the value of the currency a little, sell their holdings, and leave. However, if we find that the creators continue to work on the coin long after any get-rich-quick scheme should have expired, is it still reasonable to say that the coin is a scam?