There is a reason to it, no where does the currency tanks 60% over the course of an year.
I bought Xli in Aug 2017 @1,755,000 when the dollar was 105 that makes my car worth $16,700 (PKR 2,590,714 @ today rate) , Now after 02 years putting a fair depreciation of 20% (10%/Annum) the value should be 13,800$ that makes roughly 2,070,000 PKR. had the rate remained same and dollar at 105 and new car available at 1.8million do you think any one in their right mind would even think of demanding 2million for used car??
So yes if the currency keeps nose diving then things will appreciate in value no matter what any one has to say.
For me when i sell my car i will need a new one and a new cars have gone mad in pricing it gives me leverage to ask a much higher value than invoice price.