“I wear the chains I forged in life… made it link by link”
Symbolism of chains: made of links which are interconnecting, alike to how he is warning Scrooge that his covetousness is interconnected to his anguish.
chain also symbolises restriction and entrapment through Marley “dragging“ his chain is a conceit for the restricting and eternal consequences of being parsimonious
personal pronoun: use of “I” implies Marley acknowledges his own remorse and the consequences of his own personal and selfish pursuit of material wealth, leading to his eternal and spiritual poverty