How long can you keep an UNopened bottle of Hennessy cognac?

Will it ever go bad??? Thanks.|||It'll be ok long after your children have adult children. Just keep it in a cool, dark place and don't worry about the freshness even if it's open.|||Keep it cool and dry and out of the sunlight and it should be good indefinitely. People have discovered bottles of wine and alcohol from several hundreds of years old and they drank the contents! Alcohol stops aging when it is bottled .|||Keep it in a cool, dry, and dark place. Should last a good 20 years.|||Forever, it's indestructible.|||Nope