It's not being used as an actor in the sentence.
Which one is the actor there?
Help me learn, ESL.
There's nothing to learn from jstanley; he's a crackpot.
The subject of "appreciating" is "$1m in housing", or if you want to narrow it down as much as you can, the subject is the word "dollars". ("$1m in housing" is shorthand for "one million dollars in housing".)
I am definitely high risk for crackpottery, but not sure I'm quite there yet.
Which hasn't prevented you from expounding at length on your obviously false ideas.
What would you label yourself, if not a crackpot?