So will gold go to 3000$ per once?: quite possibly
And how can seven trillion in paper money have any value: it doesn't. it isn't paper. How can you value digital currency?
What was the money issued against?: a promise to pay
It's 0 and 1s represented by pieces of paper representing debt used as security to buy real assets. And it's a great system until someone refuses to accept these 'pieces of paper'.
The real question you should ask einstein is; when will that happen?