This is factually incorrect. On May 27, 2016, the value of Bitcoin was around $475 ($473.16 according to Coinmarketcap). By January 2017, Bitcoin was still mostly sitting at less than $1,000 (with a brief spike above that). By May 27, 2017, one year after the GTX 1080 launched, Bitcoin was at $2,155.80. This upward surge started around April (you could even argue it started around December 2016) and continued though the end of the year, when Bitcoin broke into the $19,000 range. There were some higher GPU prices in the summer of 2017, but the massive GPU shortages hit around November, and continued through the summer of 2018.1000 series cards came out May 27, 2016 when bitcoin what was worth approximately 2000 dollars. In the following 6.5 months its value sharply increased to over 16,000. I have no idea where you got this information. Immediately within 1 month of the release it went up 1000 dollars. As the more efficient cards released in the following months, the value continued to go up. My personal belief is that graphics card launches bring e-coins into public conversation thus increasing interest which is what bitcoin is basically propped up on. Just as stocks are propped up by the general consensus of speculation, up or down.
I remember this quite clearly, as the GTX 1070 Ti launched on November 2, 2017, and initially I thought, "Who really cares about this card?" It didn't immediately fly off the shelves... until people realized Bitcoin was going crazy and bought up all the GPUs. What's funny is the final paragraph of my GTX 1070 Ti review: https://www.pcgamer.com/geforce-gtx-1070-ti-review/ "There's a chance the 1070 Ti will cause retail pricing of GTX 1070 cards to drop a bit more, but we still haven't returned to the pre-cryptocurrency-craze prices of as little as $350 for a GTX 1070. Hopefully that will happen during the holiday shopping season." Famous last words, as right after I wrote that, prices shot up and you couldn't buy anything.