Doomed to failure
Various companies have been trying to push eCash systems for at least 20 years now. It has never been successful and it never will be because there is no market for it. There is no benefit to the consumer of such a system.
It will never replace cash or debit card because it has the disadvantages of cash, and the disadvantages of a debit card and the advantages of neither. It's a stupid idea and the only people that want it are the suppliers who plan to make money by skimming every transaction or top-up.