OK ... while the "Oden fan boy" is some thing people like to wank .... but it's kinda stupid to fanboy some one with what they had in their last moment of their life ....
about the handcuffs
the more logical reasons behind them
he have a DF
he is a trouble maker
he have those handcuffs to be weaker
with his DF he should be far more stronger
maybe Kaido fear his son true power (in terms of how much he can destroy)