People get car loans/leases every day. It's a baby business transaction.
Imagine taking out $10,000 BTC car loan in October...
Now you owe $20,000 in BTC, baby... and your car is now worth < $10,000.
That's why Bitcoin is a total non-starter as a currency...
But it's gonna do great as a commodity.
Unless an Alt can manage volatility...
By linking it's value to something like gold or a commodity basket...
Or have a professional futures exchange to hedge volatility...
Crypto coins cannot be used in even SIMPLE real world business transactions.
at cap out point though it should be stable or steady state, eg it will reach a natural market percentage and that it, at that point it may be very hard to influence the price that much because there wont be enough entities left with free cash/resources that are prepared to do this.