[artdigital]

What is “the average attacker”? If someone is compromising your entire password manager then that’s far from average and sophisticated

If OP is part of a bigger breach, those data dumps will almost certainly get analyzed automatically and multiple wallets swept at once. Passwords to interesting stuff likely aggregated and then tried. It’s not some script kiddy that browses through the vault 1by1

[ethbr1]

But OP's point is which will happen first in a breach?

(a) Trivially accessible Bitcoin is stolen or (b) passwords are used to ferret items/info of value out of additional individual sites

For OP's plan to fail, someone has to leave $15k laying on the table, in plain sight and for the taking, while they plan their subsequent moves. Which is why the amount matters.