No, initially you were in possession of the value, as you could have sold the bitcoin to somebody else for that $1000 dollars. The fall of value in a bitcoin did not somehow go back in time, find the person you bought it from, and transfer value to them.
Think of it this way, I buy a nice car for $100k. The person selling it gets $100k in cash, and I get $100k worth of car. A year later, I crash the car and it is now worth $1k in scrap metal. Where did my $99k worth of value in the car go? Did the dealer somehow acquire that value? No, I simply destroyed it. I destroyed the value of the car, it wasn't taken from me. The value of the cash I gave the dealer? That is more or less still the same, but that is his business, not mine.
Value is not zero sum. Creating and destroying value is trivial.
