<prompt> Human: I know that selling the house, downgrading and retiring on the cash is a classic strategy but I was wondering if it would make more sense to keep the space and rent it out if they decide to move out? Property in the Bay is so valuable and will probably keep rising right?  <response>: and will probably keep rising right?There is no guarantee of this. Any one of a thousand things could happen to cause this property bubble to burst. No-one can accurately foretell the future.The important thing is to make sure that the plan is feasible and will result in the desired outcome- its inadvisable for a retiring couple to take on unneeded risk for the chance of unnecessary profit. 