Proof needs to come from mining revenue. Until dolllars come in from gold sales, then anyone can have doubts.
Past failures don't necessarily mean future ones.
I've lost more money than most people in DGRI. I've sold for a tax loss and then bought back at a greatly reduced PPS only to have the stock drop even farther. It is one of the jobs of management to manage the PPS. I can't say that this has been done well, but the economy is in terrible shape and most small gold exploration companies are not doing well. However, when and not if the economy tanks again like in 2008, gold and silver mining companies might just be the best investment versus the large banks which are in the business of gambling with our dollars.
There is no such thing as a no risk investment. Some companies make it and others don't. Capable management is the key as long as there is a good product and/or assets. Bad management can ruin any company if it is totally self-serving.
Just think about an answer to this question. Do you think that DGRI management has set out to fail? Wouldn't it be in their interest to make a big success? They would surely profit more from winning than losing.