This is one of the most professional projects of this year. It comes as no surprise, as the French are professional in most of the things they do.
Tezos is one of them and will be out this summer to prove it.
This Ico is a safe bet to me at least as  as blockchain.io has proven operations since 2013, it comes with 170k accounts, it is profitable since 2016 and Dominique Rodrigues the CTO is a highly skilled research engineer with more than 15 years of experience as a part of the French Atomic Energy commission, and moreover, the business is registered with the SEC.
The BCIO token will be used on the trading platform as an utility token, something like Binance, or how they put it "both for services and to perform operations on the exchange". The same like with Binance, the token will be used for discounted trading, surveys and rewards.
Also Blockchain.io is determined to fix Security Breaches, Non-compliance, Opacity and Outages.
Blockchain.io as a cryptocurrency exchange it targets, not only individual traders but also  institutional traders and investors and is decentralized and “trustless” .
To me, all these qualities are more than enough to consider this one of the best projects of 2018.