The Seasiders turned down several bids for Adam in January but the club captain - a shortlisted nominee for the Professional Footballers' Association Player of the Year award won by Tottenham's Gareth Bale on Sunday - is widely expected to leave Bloomfield Road at the end of the season.
Holloway, whose team have won only once in their last 13 games and on Saturday dropped into the Barclays Premier League relegation zone, told the Blackpool Gazette: "I haven't got a clue whether he'll move on or not in the summer. I can't worry about things that aren't in my control.
"The situation will be taken out of my hands because of how well he has played. Other people who have a lot more resources than I have will have seen what he can do, and it will be their choice and not mine. One thing I do know is that the chairman (Karl Oyston) couldn't have done any more.
"If Charlie had gone and we'd hit this bad run of form, everybody would have looked at the chairman and blamed him. But I think he has tried to do the right things for the fans, for the team and for us, the staff - maybe not for Charlie personally.''
Adam's current contract at Blackpool runs until the end of next season.
"Players sign these deals and they should see their contract through, unless someone offers us a fee which is respectable and I didn't think we were offered that in January,'' Holloway said. "So until his contract runs out, surely we should hold out for what we think is right and not be bullied by some bigger, stronger and tougher clubs. That's what they were trying to do in January and I didn't like it.
Adam sustained a foot injury in Saturday's 3-1 defeat to Wigan, although reports have suggested the 25-year-old should be fit to face Newcastle this weekend.
Meanwhile, Blackpool have announced that their former player and manager Allan Brown has died at the age of 84.
Brown joined the Seasiders for a fee of £26,500 from Scottish side East Fife in 1950 but the midfielder missed the 1951 and 1953 FA Cup finals due to injury, with a broken leg ruling him out of the victory in the latter.
He made over 150 appearances for Blackpool and returned to manage the club on two separate occasions.