Janfred, I would drink the wine at the next special occasion or family gathering. Sparkling wine holds up well in storage but not forever. Dom Perignon is a high quality, sturdy, sparkling wine so it can withstand aging better than most of its ilk. (That being said, I would have a bottle on standby just in case) I have found the the optimum temperature to store Dom is 56-59 degrees F. Of course, vertical is not the best position is which to store it. Your bottle of Dom has appreciated quite well (currently selling for $225-275) and I hope that the quality meets the expectations.
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