The trouble with drugs like cocaine is that you never know what they have been cut with. So aside from the effects of the cocaine itself, you have the potential for some nasty effects from whatever it may have been mixed with. And it will have been cut with something, that's a given in the world of illicit drugs. If it's just talc then you'll have got off lightly, however you'll never know exactly what's in it. If, as was previously mentioned, the stuff currently available is only 10% coke, you're looking at a 90% unidentified substance you'd be subjecting yourself to. Worth the risk? Not in my opinion.