But if you are planning on selling near the top and these are the signs why wouldn't you just use them? I see no reason to switch to a fiat currency when you would already have the currency used in common exchanges, assuming your criteria was met.
Yea its tough to say. I would have to assess the situation when we get there. On the one hand i would say that the end game is to move my btc into silver or gold, but who knows we could be mining asteroids by then which could cause gold and silver to be worthless as a money. Perhaps an element that is so rare that even when we mine asteroids its incredibly valuable, iridium or osmium maybe?