True. I suppose you'd have to make your own judgement about when it was safe to get out of the 100% gold lifeboat and back into the traditional PP. Something that I'm sure would not be easy to do in real time.
Edit: Potential solution. After the crisis is over, let's assume some degree of regular commerce reappears and the person in question has a job. That person resumes accumulation of savings upon first paycheque and puts their assets equally into stocks, bonds, and cash but not into gold. The investor then only adds to the gold portion when the dollar value of the other 3 assets has "caught up." This might be a workable policy.