As Jaaskelainen nears a full recovery from the thigh problem that has kept him out of action since New Year's Eve, performances are becoming more important for Bogdan.
To that end, he could not have done much more in Saturday's 3-0 defeat to Manchester United at Old Trafford.
In addition to a tremendous penalty save to deny Wayne Rooney, Bogdan also turned away a couple of Danny Welbeck efforts, in addition to one from Nani.
Coyle admitted when Jaaskelainen does return, possibly against Liverpool next Saturday, he faces a tricky selection dilemma.
And for that, he feels the 36-year-old veteran of almost 500 league appearances for the Trotters deserves much of the praise.
"How Adam has done in this run of games shows he is destined for a huge career," said Coyle.
"A lot of that credit has to go to Jussi.
"He has helped to develop him. He has worked with him every day and ensured he reaches the same level he trains at.
"We are fortunate in that respect because it means we have two terrific goalkeepers."
Bogdan is still only 24 despite having been with Bolton for four and a half seasons.
It does appear he is starting to fulfil the promise that persuaded Sammy Lee to bring the Budapest-born player to the club.
Bogdan's talent has not gone unrecognised in his homeland and he won his first senior cap in June.
And, in responding so well to conceding a 92-yard goal to Everton's Tim Howard recently, Bogdan has shown he has the mental strength to go with his ability.
"That was a freak goal," Coyle said of Howard's effort.
"A gust of wind took it.
"It was nothing to do with confidence. Actually, Adam was terrific at Everton.
"He is destined for a huge career and is relishing the opportunities he is getting at the moment."
Coyle was able to pick other positives to take out of Bolton's latest defeat, including the outstanding effort of midfielder Mark Davies.
However, with Gary Cahill's £7million move to Chelsea almost complete, it is clear money needs to be reinvested in his squad if Bolton are to succeed in their survival quest.
USA defender Tim Ream's transfer from New York Red Bulls is expected to be tied up early next week, providing a work permit is granted, and Coyle has his eye on other targets as well.
"We would love to get a few players in to bolster us for the second half of the season and make sure we remain in the Premier League," he said.
"But if we don't, this group we have is good enough to stay up.
"That is the aim because if we are able to do that, Bolton will be in the best position we have been in for many years to develop our football club."