Walk away.
Seriously, why is this even a question?
- 5kg of coke goes missing, someone's going to come looking for it.
Here's the scenarios of what would happen:
#1 - Lifetime supply of hookers and blow: you're hooked, strung out and dead in a week
#2 - New dealer on the block: You either end up with a bullet in your head from rival dealers or locked up for 20.
#3 - Selling supply: Go around advertising you have "a large supply", see how long it takes for the local kingpin to track down who's muscling in on his turf. You end up with a bullet in your head, or if you're lucky locked up for 20+.
Option #4 - you get lucky, you do things smart and sell a bit at a time to fund a modest lifestyle. But guess what, you have to LIVE with 5kg of coke for however long it takes to get rid of it, so you're a target as long as you have it. You're looking over your shoulder for the rest of your life. It's your best option, but you're still a dealer with a mark on your back.
I don't see how any option is appealing. Banana flavored coke though...