has this bottomed, or is faith in the dev continuing to fade?
Neither the release of screenshots and confirmation that BitKey indeed isn't vapourware increased faith in the dev, and caused a number of people in increase their stake, thus causing the price rise to 10K, but hitting that mark also allowed certain people to sell either at a profit or without taking a loss, people who've decided to give up and move on, or who possibly bought a large chunk at 6K and made themselves a handsome profit selling at 10K. thus the price drop.
Overall trading volume is still so low that these things are able to have such a large impact on the market, it's part of why we desperate need to get into another exchange.
With hopefully more regular update of progress however confidence should continue to grow and that will be reflected with a slow increase in price and gain in trading volume.