If i were you, I’d sell now. You can probably get out and make some money. If you take history as a guide, the last housing slump was from 1989 to 1996. I think that we are now at the equivalent of 1991. So, 4 years from now, you might end up selling your house at the worse possible time, substantially below 2004 purchase price. This slump may last longer than the last downturn.
Think about the carrying costs you’re paying now. You will not recoup them in appreciation. You might be better off, selling, renting, then moving on whatever destination you’re planning to move to.