I lost money on darkcoin (DASH). I bought a stack early on before I knew about the instamine. Once I realised the truth I sold for a loss and took the hit. I could have held onto my DASH in the hope of breaking even someday, but I just don't have enough time to follow threads and news for coins I KNOW will fail eventually. My most scarce resource is time! I did the exact same thing with bytecoin (BCN), once I knew it was a scam, I knew it would fail eventually, just not when, so I moved on to spend time resources looking for coins with better chances of mass adoption. I don't regret either decision.