The peak happened 2 years after the release, a period where they saw a massive growth as their incomplete game hit, and then saturated it's market. The majority of the decline is being blamed on the unexpectedly high costs of the the phantom liberty DLC, and the studio's backlash to the first release's crunch culture. CP2077 coming out incomplete didn't sway their customer base, leading to investors backing off. The cost of the follow-up caused investor stress, especially because of the internal strife of crunch culture, which lead to major parts of their dev teams leaving to be competition. This is what has lead investors to cash out, and thus devalue their stock. It wasn't the incomplete game release that rocketed them to all time highs. That move saw crazy successful sales.