Profit or fame?

There are many reasons that people blog, but most are looking to gain something.

What are you looking to gain? Would you prefer to be rich or famous? (Both are highly unlikely)

But, what I mean by that is simple. Do you blog for a few dollars here and there, or do you blog to spread your knowledge? Is it possible that you can combine the two? I feel like it is. Blogging purely for profit is boring and pointless. What good is receiving millions of hits if nobody enjoys your content enough to revisit?