So, we all know it is going on forever, but who knows what the ending has instore? Well here's my hypothesis.
Well, I think he got realy bored as a highscholar detective and decided to create a puzzle. But what fun are puzzles if you know the answer already. My theory is Conan turned himself into a child and took away his memories. That was he is slightly physically disabled and doesn't know the outcome. But wait, there's no confliuct or puzzle to solve yet, unless he knew his own mind well enough. He hired people to run around and cause havoc for him, leading him astry in the ongoing puzzle. He also knew himself well enough that if he were turned into a child with no idea who turned him that way, he would most deffinantly try to find out who it was and reverse it.
Well, Conan would never guess Conan turned him into a child. It may seem a little hard to follow, but trust me, anything less would suck. Everything needs a giant plot twist.