Cardano (ADA) has been proven to be one of the most reputable crypto projects, backed by a very transparent team. Weiss Ratings released their ratings for cryptocurrencies for May, 2018. Weiss Ratings is the leading independent rating agency, and has been in the business since 1071.
The recent list made public by the infamous rating agency is composed of 93 cryptocurrencies. Weiss Ratings use the grading scale A = Excellent, B = Good, C = Fair, D = Weak, and E = Very week. A plus and minus is attached to indicate the upper and lower tier of a grade range while the grade F is assigned to cryptocurrencies that have had fraud or credible allegations in the past.
In the list made public by Weiss Ratings, no cryptocurrency received an A or a B+, however, 14 received a B or a B-. Cardano (ADA), EOS (EOS), and Decred (DCR) topped the latest ranking with a B. The rank of Cardano is just a confirmation of the credibility of the Foundation behind the project.
https://stocksgazette.com/2018/06/05/cardano-ada-tops-the-crypto-ranks-regardless-of-falters/