Crack or Cocaine does not mean automatic failure or lack of ability to function properly. According to Wolf of wall street its pretty common in the higher echelons in the corporate world.
Maybe, but I used to know a guy who ran a successful smaller business with his father and he was a recovering coke addict (not the father, the guy I knew). (He used to have a raging habit, but had sought out treatment and stopped using).
1. He LOVED coke. More than anything in the world, he loved coke.
2. He said, "just sitting here talking to you, I WANT to go out, buy some coke, and get high" (and he had been sober for several years.)
3. It ruled his life. He told me that from the moment he woke up, the the moment he fell asleep, he wanted to do coke.
4. He would drop whatever he was doing to get high.
5. Once high, he wanted to stay high, and nothing else mattered.
6. His habit was huge. I seem to recall him telling me it was 200 grand a year and I'm going back 15 years.
None of the above recollections are good as far as I can tell.