Large encrypted database on Android app. A good practice?

I want to keep a 22mb large encrypted sqlite DB in the assets folder of my Android app. When the app runs, I want to copy this DB to the actual DB in /data/data/... which is also supposed to be encrypted. Then I want to sync this DB time to time with the db on my server. No doubts in implementation part, but can anyone please suggest whether it is a good practice and worth it? Thanks.