Brendan Rodgers hopes that he'll get at least two seasons out of Moussa Dembele before the inevitable offer lands on his desk.
With Crystal Palace paying Liverpool £30m for Christian Benteke during the summer it's not totally out of the question that Dembele could fetch a similar figure.
When he indicates that it's time to move on it's likely that a club bigger than Crystal Palace will be looking for his services.
Almost certainly a bidding war will break out, but, as with his move to Celtic, the player and his agent will have a major role in deciding the next career step.
England would seem the likeliest of destinations but having previously turned down opportunities to remain down south, a move to Spain or Germany could be possible.
Whatever happens, Rodgers believes that there are other Dembele's out there, waiting to be polished up and given the right platform.
Celtic fans are well used to seeing stars depart, it was difficult to replace Victor Wanyama, Gary Hooper and Virgil van Dijk.
Perhaps under Rodgers the sale of Dembele won't be the end, it may just be the beginning.
Celtic have achieved some great results in the transfer market in recent years, so we take a look at the club's biggest sales and how the windfall was used...
AIDEN MCGEADY
There comes a time when even the biggest of Celtic fans has to move on and test themselves somewhere else.
A move to England had always been predicted for McGeady but the Glasgow boy looked further, much further and took up an offer from Spartak Moscow.
Celtic happily converted whatever number of roubles into £11m and handed the money over to Neil Lennon, who brought in a new team to replace his inheritance from Tony Mowbray.
Lennon brought in Gary Hooper, Joe Ledley, Emilio Izaguirre, Anthony Stokes and Fraser Foster to launch the current title-winning run of five in a row.
FRASER FORSTER
Seamless, absolutely seamless. The timing may have had a lot of good fortune about it but just as Forster was about to depart, Craig Gordon arrived at Celtic.
It didn't take a genius to see the plan but there was a heavy element of good fortune involved as Gordon emerged from three years on the crocked list to replace Forster without flinching.
Having Jason Denayer and Virgil van Dijk in front of him helped greatly but as handovers go, swapping Forster for Gordon with a £10m adjustment was a fantastic move for all.
VICTOR WANYAMA
No one could have predicted the incredible development of the Kenyan midfielder.
Beram Kayal was displaced from the Celtic side as Vic made his mark with more than a few opponents also feeling his presence.
After two domineering performances against Barcelona his departure was inevitable, his destination, Southampton, was a surprise with other clubs perhaps put off by his fiery temperament.
There were no direct replacement lined up with Joe Ledley, Scott Brown, Beram Kayal and others around, so the £12m fee was banked.
GARY HOOPER
This one will remain a bit of a mystery, with some claiming that there wasn't much of a gap between the player and the club over a new contract.
QPR and Norwich were both keen on a £6m deal as Hooper entered the last year of his contract.
Amido Balde had already been bought, Teemu Pukki was about to sign dependent on Champions League qualification and so kicked in a disastrous chain of events that involved too many strikers to mention before Moussa Dembele solved a massive problem.
VIRGIL VAN DIJK
This transfer seemed as inevitable as Mark Viduka a generation earlier, to some it was a surprise that Celtic got a second season out of the former Groningen defender.
Van Dijk was a class above everything else in Scotland but his European displays were as disappointing as those of his team-mates.
That scared off bigger clubs but again Southampton moved in and spent £10m wisely, so wisely that within nine months van Dijk got offered another contract.
Celtic had Jozo Simunovic lined up as a replacement, the jury is still out on that deal with Erik Sviatchenko and Kolo Toure also recruited to make up for the gap left by van Dijk's departure.