We know that bitcoin is more useful and one of the best currency in the world. I agree with you bitcoin is better than cash. It is more secure ans safest currency. If we hold bitcoin in future we must get enough money. Because the price of bitcoin is increasing day by day.
Actually in modern time the number of bitcoin users are increasing and specially the young generation are now giving more prerference to bitcoin which is the reason that we can consider bitcoin as best than cash. In modern time the concept of cash is now decreasing.