Middlesbrough boss Gordon Strachan is a big admirer of Adam and is believed to have tabled a £1.5million bid, but Blackpool have knocked it back.
Holloway told the Blackpool Gazette: "I've told Charlie about the offer.
"We have a bit of a pact that I want to get him to a club that - if I'm allowed to say it - in a much, much better situation than us. Why leave Rangers to come to Blackpool and then step sideways? Why do that when I think he can step up?
"I think he will still be here at the end of the season. It is normally after 18 months that I lose them."