So far, I have not encountered a personal experience of ICO scamming. There were ICOs whose tokens took a very long time to recover even their ICO price. But everything ended up worth it in one way or another. I was once a part of Opus Foundation community of supporters. I had several OPT tokens. I am not a dumper by nature and so I continued to hold on to it for a long time. I waited for the most perfect timing for me to finally sold some Opus Tokens.