Coyle watched Ivan Klasnic clamber off the bench to seal a dramatic 3-2 win over Aston Villa and move Coyle's men up to sixth place with nine games of an increasingly productive season remaining.
The Scotsman said: "We're enjoying it but we won't get carried away with it. We saw what happened in January when we went down to 15 fit players. It can come back to bite you on the backside."
Klasnic is yet to start a game in the Premier League this season and Coyle believes it is the kind of selection problems that keep the likes of Klasnic on the bench that bode well for the club's future.
He continued: "Ivan's finish was special. He's got that in his locker. I told him before the game it wasn't easy picking this team because there is more than 11 players who deserve to start at the moment.
Klasnic blasted home from close range after David Wheater had flicked back a deep cross from Lee Chung-yong.
It capped a stunning recovery from the home side while Ashley Young's missed 70th minute penalty cost Villa dear.
Gerard Houllier's men led twice through Darren Bent and Marc Albrighton but Young saw his bid to put Villa 3-1 up from the spot scuppered by a fine save by Jussi Jaaskelainen which triggered the Bolton revival.
Source: PA
Source: PA