There are more such as profit deriving, no network error problem, easy access to your money, etc.
If you accept Bitcoin as a means of payment and you hold those Bitcoin and peradventure the price of Bitcoin is surging high, then you will have an additional profit on your business capital because the value of the Bitcoin will increase. Sometimes there could be some bank network glitch that can result to a failed transaction but with Bitcoin you will not experience those network error problem. Due to network errors with traditional financial institutions, you might not be able to access your money sometimes but with Bitcoin, you can have access to your funds all the time.