No not possible, but hopefully it can be a permanent alternative. People need a physical currency that they can hold in their hand and spend. No matter how easy it becomes to use, there will still be old school people using matress money
I'm sure people said that about credit cards too, but they're much more commonly used than cash these days -- people will get over it with time
Some of the older generations don't even have a cell phone of a computer that connects to the internet...