The 21-year-old is impressive as an attacking midfielder for Norwich City in the Premier League.
He has six goals for a team that is bottom of the table in their first season back in the top flight.
And Bruce would not be surprised if Cantwell moved to a huge club like the Reds in the summer.
He told Football Insider: One thing that he gives you is his ball carrying.
"He is a little bit like Jack Grealish – that type of player. He plays with flair like a James Maddison. Of course, he has some way to go before he is at their levels but it is his first season in the Premier League and he has done OK.
"He has caught people's eye and everybody is talking about him. Cantwell is young, so he is definitely a prospect. It would not surprise me if a club like that takes a punt on him. If Norwich go down, it will be difficult to keep hold of him."