whether there is a digital system that is better than bitcoin?
define better, what are you looking for in that "digital system"
if you are looking for payment processors like Paypal, etc and want to be able to spend money everywhere then there are better things like PayPal, credit cards,....
if you are looking for a similar cryptocurrency to bitcoin, look at countless number of altcoins which exist today and take a pick but none of them come close to bitcoin as price, number of people using it and more importantly number of services that are accepting bitcoin (places you can spend bitcoin).