wtf is the average person supposed to do with it?
Probably don't know anybody that sells that much coke, and even if you did "crimes of opportunity" ie: 'Finders Keepers' usually involve less work than becoming a drug kingpin overnight. thats all the added stress of suddenly changing careers, with the additional likelihood that you will caught and locked up or murdered on top of it.
So really your options are 1) snort all that shyt yourself. Just act like you came into a lifetime supply of coke for personal use. which again, most people aren't cokeheads so that might not appeal to most people.
2) if you not a massive cokehead, call the cops and let them know you found that shyt and it has nothing to do with you.