Value is determined by whatever buyers and sellers agree to...except these days, since the price manipulators of Wall Street have perfected their craft.
You are equating value with how many federal reserve notes you can trade a Bitcoin (or other crypto) for. I don't value things that way. The federal reserve note is designed to lose value each year, each month.
It took 3 Bitcoins to buy a pizza a few years ago. Now, it takes a small percentage of a Bitcoin to buy one. During the same time period, pizza was also traded for 25 US $ then, and 30 US $ now.
Granted the federal reserve note is the world's currency and super easy to trade, but I still don't think it is wise to set a currency pegged to a fiat currency that loses value over time.
Of course, that's just my opinion and not financial advise, so do what you want...I'm just blathering...thanks.