Digital asset backed tokens solve the problem of purchase, storage, and exchange of commodities that exist in the real world. Gold for example is expensive to store, to move, and to transfer from one owner to another.
With gold seen once more as a strategic asset, central bank buying has been steadily on the rise. One obvious reason is to diversify foreign exchange reserves away from US dollars.
Much of the modern global financial system is a paper system that relies on trust between counterparties. We assume the money will be there when needed.