9 10k Eggs Dilemma

personally, i value stardust the most of any resource in the game as it is the hardest to accumulate. and say you hatch a bunch of sudowoodo and get a bunch of useless candy. now you at least know the dust will be good regardless of what the eggs contain.

Hatch now for double stardust. It's very likely those eggs are sudowoodoo skarmory aerodactyl. Maybe a snorlax lapras dratini. U can always refill up on eggs easily. One month without hatching is a long time. U will gain more now compared to saving them. U get double dust and u will be hatching more eggs til Halloween. If u saved them u might get double candy but at what cost? You could of gotten way more hatching them asap and more dust and candy along the way to Halloween.

Well personally I would hatch it now for the double stardust as stardust takes a much longer time to accumulate than candies.

Also it's also not yet confirmed by Niantic that we would get a double candy perk for Halloween.

You should hatch them with super incubator...

Don't wait.

if you did want double candy, you could just hatch one at a time so that you'll still have at least 8 10ks going into halloween.

one thing to consider is that the good Pokemon that were in 10k egg are now hatching in 2k eggs for the event. if that also means they don't appear in 10k eggs during the event, that would mean any 10k acquired during this event is guaranteed to be something crap, either sudowoodo or aerodactyl as it can't be dratini/larvitar etc

You'll have no trouble picking up 9 more.

There are many great answers to your Q (I read half). Hatch now since the "opportunity cost" of waiting is that you are gonna miss a lot of good eggs for the last 3 days of this event. Also, because Niantic shifted some of the best "10ks" to 2 k eggs you might not have a lot of winners amongst these 9. Maybe a dratini / snorlax / lapras or two but lots of chaff as mentioned by other answers. For me, I want to get Larvitars and this event has actually resulted in much fewer Larvitars than I hoped since this week I get nearly as many 10ks eggs as 2k eggs ... and Larvitar has a much lower % in 2k than it did amongst 10k. I DO INDEED appreciate the many dratinis I get from these 10ks (but I have many Dnites already) and appreciate the greater stardust from 10ks. But just saying I wish they had left LVTR and Chansey in the 10ks