Can you have a patchy beard AND go bald?
i've only seen balding guys with full beards.
also, pulls ups or chin ups?
I dunno. I asked this exact question on /fit/ ages ago and the general consensus was that it really doesn't matter if your doing pull ups or chin ups. They both do a comparable job.
You could probably alternate between them if your really indecisive about picking one
Different anon here. My hairline is receding too and here is my patchy beard.