http://www.cnbc.com/2015/10/03/t-mobile-us-incredibly-angry-at-experian-over-data-breach.html
If you are still wondering if Bitcoin is superior form of currency / payment rail among other things above is your answer.
Bitcoin is a superior currency of course, but it won't be the end of data breaches, because you will still have to order products and services from companies. The data breach could have happened at T-mobile itself as well (remember the eBay-leak not long ago).
The only method to entirely prevent such hacks: Don't collect data. However that stance can't be conveyed in a world where governments and companies collect more data than ever... If you ask me, those persons responsible for collecting and insecure storage of the data should be obligated to compensation for any adverse outcome for every single one of the 15 million customers.
ya.ya.yo!