For sure this will increase in time. Keep it safe and sound. I know for sure a lot of (European) collectors would love to have a barrel like that. Did it come with original certificates ?
The bottle shape has changed so like all the other members on this forum say, keep the barrel & bottle together and see what time will do to its value. At the moment loads of old single barrel bottles are around so give it some time..... I would say, never sell it but if you ever deside to sell, let me know (LOL)