I invested in TheKey ICO, respectively I bought token after the first listing on Kucoin exchange because it was impossible to buy tokens right in ICO token sale. The website was down in few seconds. This was the last hype around the token, now look at the price, it is 98% down since ATH price.
I also know TheKey and this project helped me earn more than 400% of profits in a short time. Actually, TheKey is one of the projects using the NEO platform and was very successful during that time.
Now things are different and the development team is almost gone, so if you choose to hold it in the long run, this coin will only cost you money and wait time.