Should I use Firebase Events & BigQuery or A Custom Cloud Firestore for Data Analysis?

I'm collecting anonymous data bout the type of content users are consuming with my Android app, and I'd like to do some analytics on it and maybe build an internal dashboard for the most popular content, etc. I can either create a custom cloud firestore database to do this, OR I can just use firebase's built in event logging and then try to extract the information using their BigQuery service. Not sure which route to go!