It's anonymous and literally impossible to shut down the biggest benefits imo.
False, it's not anonymous, it's pseudonymous. All transaction data is visible to everyone, but you only see the Bitcoin adresses.
(Better than giving out your real name like in bank transactions though, but less anonymous than paying with cash)
Another really big benefit:
The amount of Bitcoins is limited, thus it cannot be devalued like other currencies by a government printing more money.