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.
Nicely Described the purpose of Bitcoin, It's true that Bitcoin is the fastest transaction method and it doesn't need any fees. Also, Bitcoin can be used for shopping purpose and You can buy anything through Bitcoin.
So Bitcoin can be considered as a payment tool, Bitcoin also can be used for business purpose. you can trade and invest in this platform. I think so Bitcoin has a versatile using facilities.