Considering that these stable currencies, including the currency issued by Paypal, are backed by the US dollar, they do not go beyond being a new form of the dollar that can be called a digital dollar.
So far, the problem with most of these currencies is that it is not certain that they actually have a dollar cover that covers all the stable currencies that are issued. And in all cases, the dollar's crises require solutions of another kind, at least to maintain its position as a global currency, especially since there is a global trend to reduce its use. One of the biggest crises of the current dollar is the foreign policy of the United States itself, which strengthens the alliance of its enemies against it.