Some good reasons why you use bitcoin.
1. It is fast. Transactions are instantaneous and confirmation times are usually done withing 10 minutes.
2. It is cheap to transfer any amount of money anywhere. Fees are insignificant at this point.
3. Your bitcoin are your alone, they can't be blocked by bank, IRS or any institutions.
4. There are no charge backs.
5. It's untraceable. You can transact with bitcoins and severe the ties. They can't sniff you out.
6. Transactions are made even faster when compared to fiats.
Just some of what I feel the other benefits of bitcoins. They practically said it all.