It seems like the alpha city coins might be part of a scam project, particularly if their team is asking for your 12-word pass, which should never be shared with anyone. Such actions are not typical of legitimate projects.

The drop in coin value could be due to the project being a scam or the market price dropping significantly. It's crucial to DYOR before interacting with cryptocurrency projects. Unfortunately, if the project was a scam, the value of the coins might not recover. Always verify projects' legitimacy and avoid sharing sensitive information like private keys or passphrases.

If the project was listed through verified channels like the Slush Wallet, it's possible the project had some credibility initially, but changes in value and such requests for security phrases indicate a potential scam.