many reasons for price collapse

There could be many reasons for the price meltdown but none is known in fact.
Possibly it's getting rid of shares at tax time.
Another reason maybe that there is a problem with the company,insiders know and they sell.
Yet another thing could be just the market going down and mmx following the trend.
Also,maybe China was hit by a disaster but we don't yet know,we will be told in due time...
Too bad there is no hint here as to what the reason might be.
My problem is,should I average down or should I go by the idea of not throwing good money after bad,sell and present it as a loss on the tax return.