Price policy BR

I revive this old thread as I have a similar question, I'm interested in buying PE tickets CGK-MXP (next feb will start the new MXP service) during Xmas 2020 holidays for my family of 3, as for high season I guess very difficult finding J return fares at decent price. My plan is to buy one way BR PE basic that costs around 1100 USD/pax (800 in Y as comparison) and the return on SV in J from ATH which cost less than 600 USD per pax, let's add 100 USD pax for the repositioning to ATH, total just a bit more than a return ticket in economy for the high season.
I know nobody can tell about future prices, as I never flown or followed fares trend on BR, at least maybe BR frequent users can have some hints:

Does BR time to time use to open promo deals? even more in PE?
Just doubt whether have sense to buy tickets now or just wait until next May/June.

Thanks in advance