40k what? Euros, US dollars, pesos, Czech koruna, Ukrainian hryvnia, rubles, Australian dollars, pound sterling?

In my country (in the eurozone), at most ATMs I see, the limit of what I can withdraw at once is € 400 (and I usually do withdraw that much so I do not have to withdraw very often). So € 40000 is enough for 100 people to withdraw their maximum between refillings. 100 people isn’t a lot, certainly not in busy locations.

Someone else posted a picture of USD 100000 in cash which gives you an idea of the volume.

Euros are approximately equal in value to US dollars for those who do not know this and have an idea what US dollars are worth.