I am predicting a full time draw. Chelsea has a good defense and that can be used to their advantage. PSG has a more balanced team but if Chelsea can build a strong wall in their defense they might take the game to penalties and use that as an edge to win the trophy but if they hope on scoring within 90 - 120 mins I doubt if they will withstand the heat and attack that will come from the Paris team.
It's a bold prediction. Especially while PSG are on a killing spree...

But it's a little more realistic than a Chelsea victory in regular time of course.
I'm a fan of Chelsea in the PL. But I'm not positive about them even a bit here. BTW I doubt a defensive strategy will work against PSG. They always have a solution to break into the defense...
PSG just need to have an unlucky day. Chelsea can buy some time then.