In my own opinion,it much better if we will use our bitcoin those poor people who really needs help,rather than,to donate it into the church. I believe that helping poor people in any form,our almighty God will be appreciated it,and you will also be blessed.
Some people don't know poor people or they think it would be awkward to help them in person so they prefer if some organization does this. The problem is that money given to humanitarian organization sometimes 'gets lost' and only half actually arrives to people in need. This could get solved with blockchain because it would be more transparent.