Should I be worried about this threat?

So I have a formal friend that I was talkmg to for a month but we had a fight cause he's a lying c•nt and it's been months since we really talked besides replying to each others snapchats but we haven't talked for months

Today I randomly get a message from him on Facebook saying

"I may not be very religious but boy am I praying for you big time... karma is a bitchhhhhhhh"

I thought meh probably sent to the wrong person

Then I also saw that he sent me a WhatsApp saying

"You've got it coming"

"Big time"

I don't know what he's trying to do here but I'm scared that he's going to hack my PayPal or something

Or take some of my Instagram accounts (I own large accounts that I make income off)

I honestly don't know what he's capable of but I'm not really scared for anything other than my paypal

But since he's talking about Karma and not him harming him himself

I don't know what to think