It's just simple logic, scarcity increases value, abundance reduces. By the next halving we all know what's going to happen to the pricing. So then it's now left for people to take the necessary calculated risks associated with either Hodling or Selling.
I don't see the point of buying fiat with Bitcoin.
I mean, if you buy a house, or whatever, then it makes sense. But just simply buying fiat in the hopes that you can go back and buy more Bitcoin later on?, seems very unlikely that that plan will turn on perfect.
Also you have to pay exchange fees, use a lot of your time checking prices, news, etc, tracking the economy, etc, just to try to time the tops and bottoms, and also paying capital gains tax, etc.
Even if you make X amount of money, you'll be having less because of the exchange fees and the taxes. And possibly you might end up not making any money, and still paying those fees and taxes.
Whereas if you just save Bitcoin, you don't have to worry about any of that and can focus on your own life.