All people use cash Unlike bitcoin, only the person who have internet can use bitcoin and those people who really want to have bitcoin. That's why cash is better than bitcoin. Even adult or young know and use cash.
But time is changing at a fast rate, nothing is permanent in the world and cash is likely to extinct in the coming years. Cash might have advantages over Bitcoin at the present but future needs more accurate currency than cash and at that time Bitcoin can act as a substitute. Cash can help in easy transactions and so do Bitcoin; I think Bitcoin has more advantages over cash right now. It may need internet and cannot work offline but it is definitely a revolutionary invention.