1. NPV does not equal Money in the Bank - you need Money to build the mine.
2. How are you going to get money to build the mine:
a) issue more shares
b) get a loan - see step list for getting a loan:
step1: decide to get loan
step 2: determine collateral. Hmm I have this paper that a few guys wrote that says our mine is worth 540M, after the update in resource prices it's more like 1B in NPV.
step 2b: contemplate how we could possible have collateral of 1B but only have a MktCap of 200M.
step 2c: realize we only have a bit of collateral.
step 3: go to a bank and ask for 500M loan with less than 200M collateral and no way to pay them back if things go bad
step 4: bank laughs at you