This is a great first of all is the convenience for the church ad their followers. Also, bitcoin has an unstable value, but has a high conversion price so having bitcoin at its peak price, they could use it to provide the needs in the church.
I agree 
This will be good idea in exceed of our daily needs its better to give some donations mind you they are interesting to ask where did our excess money came from so I'm proudly says it comes from my hardworking in bitcoin currency.