If you don't sell from $12k, that means you don't find that price appealing. It is that simple.
So you just changed the concept of "cost" to "desired price" and think that everything is fine?
If you are so sure that you are right, then I suggest you buy my 1BTC for $25k because this is my desired price.
And I'm 100% sure you won't because
1) you are not interested in buying BTC for this amount when everyone else around is selling and buying it for ~$13k
2) you are not interested in buying any product at the seller's desired price when there are offers that are better for YOU
And what do we come to? That your "desired price" is only a fiction and nothing more to which you here appeal absolutely not wanting to remember the classical law of supply and demand.
But if you are completely sure that you are right-then you are welcome, my 1BTC for $25k is always at your service, sir!