Is Prime Day worth participating in?

I have a PL product on Amazon for 1 year now. I am hesitant to participate in Prime Day because it brings my profit margin down to 14%. As of now, my organic ranking is good on lots of keywords, but sales velocity is very slow, so that could change before Prime Day. If I have to pay for a lot of ads to get prime day sales, I would be losing money. I would love to hear how you feel about Prime Day.