Honestly I believe bitcoin is better since one you don't use your credit card so you don't loose you needed cash but instead your cash that you could easily earn back from mining. Plus, it's open to all ages unlike credit cards.
Yes I agree with youIt's better than cash because you can do this over the internet.
It's way better than all other monetary instruments because it is programmable money: you can basically treat bitcoins as symbols to represent anything (like titles to property, for example), and have the distributed peer-to-peer blockchain mechanism enforce title transfers in a provable, reliable way without any notaries.
Some people are working on setting up fully autonomous corporations using Bitcoin infrastructure. These will be essentially computer programs that own and spend bitcoins, and sign and enforce contracts, without any human employees.