Farm spot

[final girl]

Is there a good spot to farm 10k for the insurance achievement? it so boring to do the same level over and over and get like 200 shards each time................

[Illusionary]

I'm in the same position - and while there's a YouTube guide suggesting just running the Supermarket repeatedly, I'm actually finding just gambling to be more efficient, with judicious use of force-quitting in the face of poor runs of luck.

[final girl]

at the end i did the same thing as the yt video. two+ hours in the supermarket and got all the 10k :c

[Shadow]

One other option is the right-most pearly gates teleporter and hit the trees for their fruit.

I'm honestly not sure which is quicker,

[Things Are Borked Up]

I managed to get that achievement naturally through the game from exploring the levels. Just breaking whatever I can along the path and gathering any large crystals I found allowed me to get it by the time I got to The Jungle.

However, if you're looking for the farm, but not the grind, gambling is a good lazy option. I plopped Nate in front of the shard slot machine and turned on an autoclicker and after an hour I earned about 5,000 shards. It's slow, it's inefficient, but it'll get you your achievement and the money you need to buy any of the cosmetics you still need to get. It's just incredibly time consuming.

[MKoR]

unfortunately, in order to purchase all suits AND get the 10K together, just ordinarily running through the game is indeed not enough. also spending a while in the pearly gates to get mnore money.
There's a couple of rooms with a lot of crates there that help you get a lot in a short time. unfortunately still only about ~1.5K/death.
Thankfully, i already did the 10K one, just need to finish the last outfits from the hell vendor :S