Bitcoin has really helped me manage my habits of spending money online. At first i used to use my Credit Card to by products and services through paypal online. Including the extra charges, i would barely have enough for my basic needs. Now that i decided to include bitcoin in my life; i now have two simple jobs. One for real life situations, the other for online transactions. So i can buy what i want online with bitcoin.
Bitcoin has actually done the same to me, although to a less degree. I still use my credit card when necessary but if there's an option to pay bitcoins, it's what I primarily use now. And I have also probably been better at saving and not spending whenever I feel like it since I only have a limited amount of coins and the thought of the chance of bitcoin's value going up makes me less "spendy" than before.
Yeah and I still feel that credit card and fiat is an best option for making purchases at a moment and we should save bitcoins for future to grab best benefits from it.