That's not an argument. I've flushed hundreds of € of coke down the toilet, what would you do, re-sell it? Srsly?
As to your question, yes it can and it will. Because it lowers your psychological 'threshold'. I don't know where you stand in regards to cocaine/addiction but if you still crave it and want to get it that craving out of your system by a 3 day binge or whatever, then you are not in conditions to take it. IMHO.
I do believe that people can manage cocaine but in my experience it should never be abused, ie: I feel bad, so I take it / I crave it, so I take it / etc.
Once you can honestly evaluate in your head the possibility of having two bags of cocaine next to you, and evaluating the consequences and deciding, by your standards and pure reasoning if it's a good idea to lock yourself in and take it, or to meet with some friends and take it, or to store it and wait for a more opportune time to take it, or to throw it down the toilet, and none of these decisions is covered by some sort of overwhelming 'feeling', then you're at a point where I think you can manage cocaine.
But don't take it if you're craving it.
Don't take it, get clean and just wait for the day (it will come) when you can allow yourself to take it. You are your worst enemy but once you find ways to beat you, it's a beautiful thing :D
HUGS