Here I found an interesting article suming up the largest ICos in 2017 and what happened with their token:
https://cointelegraph.com/news/post-ico-review-what-happens-to-the-tokens-of-the-largest-icos1. Tezos
Even though the project was accused of fraud and 2 lawsuits have been filed against the company, the price of Tezos tokens has never dropped below the ICO price and has shown a 12.4x return in US dollars since the ICO.
2. Bancor
3. Status
4. Kin
5. TenX
When looking back at the last year’s ICOs, the most successful projects were those, which promised to make Blockchain and cryptocurrencies more suitable for common use.
At the same time, the major problems that remain when launching an ICO are project overestimation and lack of transparency. Successfull projects should have viable documentation and business goals, follow the product roadmap and inform investors about the progress on a regular basis. But due to lack of proper regulation regarding ICOs and the increasing number of ICOs, caution remains the rule n.1 before investing :-)