Not to go into too much detail. But in a debt based system you have bonds and currency. A bond has the risk of not being repaid, speculators speculate in the likelihood of that and their individual decisions give a market price for that bond. Likewise bond may have repayment price-indexed and speculators then speculate indirectly in the currency's price stability.
Point is that even with stable prices, there is plenty of room for speculators.
Bonds are not currency. That comparison is even invalid as a strawman. I don't understand why I need to point this out.
Even if you feel the need to equate crypto-things to bonds, first you need to argue why buying, say, bitcoins can be argued as lending money to someone, which makes no sense whatsoever.
Cryptos are nothing more than speculation vehicle, and it's pretty obvious that they are massively used as a pump-and-dump scheme. The only point in time where cryptos played a relevant role as a currency was way back in the silk road times where cryptos were used with the expectation of laundring transactions. That usecases quickly went out the door ages ago.
But Bitcoin specifically excludes credit. I put $100 in the bank. The bank lends $50 to an entrepreneur. Now there is $150. That’s the magic of credit. And it’s impossible with Bitcoin.
Why is it impossible with Bitcoin? This is already taking place. How do you think the interest bearing crypto accounts work? Rehypothecation, lending the same coin possibly multiple times.
I’m not sure I get it. Only one person can own a Bitcoin at a time.
So some people of reinvented fractional reserve banking. But now with the problem that it’s unregulated, unbackstopped by a lender of last resort and ultimately through rehypothecation you’ve virtually eliminated any advantage gained by using blockchain technology.
I'm sure bitcoin purist will hate it, but afaik there's a lot of btc being held at exchanges (e.g. coinbase).
Technically instead of holding BTC there, you could be holding cBTC (value in a coinbase btc deposit account) and coinbase could issue cBTC loans similar to banks.
(The issue is that there's no backstop like in the real world, where central bank can step in as lender of last resort to avoid bank runs)
Point is that even with stable prices, there is plenty of room for speculators.