Protection against consumer tracking - This might be one of the best reasons why you should be using Bitcoin. Your
consumer spending habits should not be anyone's else's business. Financial privacy does not stop, when you hide your wealth
from other people... it extends to what you are buying with that wealth. Why do governments need to know how many times
you spend your money on junk food? {They track all your consumer spending, when you use traditional payment methods.}
If you use Bitcoin correctly, you can hide your consumer behaviour from those people who are invading your privacy.

But isn't it impossible to achieve perfect anonymity with Bitcoin? I mean every transaction you make is essentially logged in the blockchain forever.
When you buy your coins from an exchange, that's when the trail starts. Unless you're doing anonymous OTC trades, it's not that hard to track down someone's Bitcoin spending habits, at least not for governments.
Heck, it's even possible for regular technically adept people to track someone's spending habits with Bitcoin. You'd just have to tie a Bitcoin address to a person, lots of people re-use and share their addresses.
Then we're not even talking about deep blockchain analysis, which can de-anonymize transactions made through a Bitcoin mixer.