No, the admin would not DM you to connect your wallet to stake. It is important to be vigilant and never respond to unsolicited messages. In fact, if you receive a message like this, it is best to block the sender. Scammers are always looking for ways to take advantage of unsuspecting people, so it is important to always be aware of potential scams. If you ever have any questions or concerns, please reach out to the admin for assistance.