At that point when this DC was introduced (or at that era), Asian countries were crazy over producing shows to do with eternal life... Like finding eternity pill, or vampires, zombies, even CCS also included a magician who is capable of living an eternity life etc... I guess it is possible DC is also the same - search for some way for eternity?
And if that was the main aim for DC, then could it be, that the boss found a way? If he/she did, then could it be that Anokata would have shrunk already himself? Then he wouldnt have been in his 50s already...
Or it could be other way round - he was growing old far too quickly, maybe because of an experiment and that is why he wanted to find a way to turn himself back young? :???: