The 19-year-old's next career move is expected to dominate the 2023 summer transfer market, with Dortmund not expected to retain his services for another season.
The Black and Yellows won the race to sign Bellingham from Birmingham City for £22.5m in the summer of 2020, despite widespread interest from across England.
Despite his relatively young age, Bellingham immediately cemented himself as a regular starter for Dortmund, and he has 18 goals and 20 assists to boast from 107 games for the German giants.
Bellingham's contributions include eight goals and two assists from 17 games in all competitions this season, and he has scored in all of Dortmund's Champions League games so far.
In doing so, the England international became the first English teenager to score in four consecutive Champions League games in a single season, and he found the back of the net twice in Saturday's 5-0 thumping of Stuttgart.
Dortmund can expect to receive a nine-figure sum for the sale of Bellingham, and Romano believes that the teenager will eventually leave for a record-breaking amount of money.
"Jude Bellingham has already scored 8 goals this season — including four in Champions League," Romano posted on Twitter.
"It's just October, he's supposed to be a midfielder and he's still 19. Jude will probably become the most expensive midfielder ever in football history."
Philippe Coutinho currently holds that record after his £142m switch from Liverpool to Barcelona in 2018, closely followed by Paul Pogba's £89m move to Manchester United from Juventus two years earlier.
