To decant or Not to Decant

Hey everyone...just recently (yesterday) opened a bottle of wine which tasted very young and immature (the way I feel most days) and so we decided that because I have 3 more bottles of it, the next one I will decant....or should I just cellar it for a few years. It's a young Australian Shiraz...which typically i would not cellar....but is it worth keeping at a price point of $13.00/bt??? Comments....