I think the release of cryptocurrencies represents a very complex asset class. There is a specific example of tether, they issue and must always prove the money they have. Issuing assets related to gold, silver, oil and coal will require a corresponding amount of assets. After they issue, can they endorse the amount of assets they own? Orders will occur if they wish. In fact, all types of organic assets can wear out over time and risk being stolen in practice. It will take a lot of rules to realize this idea.
there are many issues with the stablecoins or the asset backed coins whatever you call it
once SEC or any other regulator decides to check the reserves , these types of coins could and usually do get into trouble
Tether is one of the most popular and it got into trouble because they could not prove that they are backed by enough USD
also they are tied to an asset , US dollar in this case , that they do not have any influence on