Common sense and patience is called for.
Actually unless you are going to try to earn interest off the cash you only need to open an account at a foreign bank (if you can get the money across the border) and fund the account with say around $8500 and also open a safety deposit box (check the various banks beforheand to see if they offer that service) to store safely the rest of the cash.
Get a debit card from the bank and use it to live - restocking the account with amounts of around $5,000 to $8,000 taken from the safety deposit box when your balance runs low. Bank as much as possible online if that service is available, the less you are seen in the bank the better. You can pay a lot of bills online and extract cash using ATMs when needed plus use the card in supermarkets, restaurants, clothing stores, for gasoline etc.
Depending upon your age and lifestyle you will have to budget the money accordingly as even a million won't last forever. Try to live on say $5,000 US per month which if you have a million to begin with will keep you comfortable for around 15 or 16 years if you are frugal. So obviously anyone in this position is going to have to try to supplement the cash with some legitimately earned money to stretch it for as long as possible.
Live high on the hog and spend resklessly by buying fancy cars and big homes, lots of women and gambling and you will go thru the million in a few years or less without some other income to supplement your original bankroll.
Lay low and find a niche that you enjoy on a small percent of your balance daily or monthly, however you want to do the math. Rent a reasonably priced apartment or house furnished so you can move elsewhere with just a couple of bags on short notice if you have to. Stick to young ladies that appreciate a gratuity after a date and don't get involved with anyone seriously, cultivate several ladies you can call if you want female company on occasion. Do not get involved, contrary to popular belief, two can't live as cheaply as one.
Bottom line don't live like you have a million dollars hidden and you should be Ok for over a decade.
wil.