Once again Weiss Ratings has published their assessment of some of the hottest cryptos for investors. But this time, they are pointing to four (kind of hot) coins they believe you shouldn’t buy.

In their recent ratings, they named Aurora Chain (AOA), Bitcoin Diamond (BCD), Credits (CS), and Mixin (XIN) as low-grade cryptos, with a rating below D+. On the news, Bitcoin Diamond which ranks 31 in terms of coin market cap dropped over 8% on Wednesday. Credits, which ranks 197, dropped over 4 percent.However, Aurora, ranking 59, and Mixin, ranking 107 showed minor change.

Weiss Ratings: 4 cryptos with Low Grades – Source: weisscryptocurrencyratings.com

Weiss Ratings reviews data points and indexes that measure key aspects of a coin’s features, such as technology, adoption, investment risk, and investment reward. In their February announcement, they gave a top-tier A- investment rating to NEO, which became the first project to break into the high ranking.

Weiss Ratings Twitter Poll Picks Ripple (XRP) as Favorite

Meanwhile, Weiss Ratings official Twitter account held a poll on the 11th of October, asking participants to vote for a crypto they think is best to buy below $1. Out of 5,725 votes, 64% chose Ripple’s XRP. Cardano (ADA) came in second with 25% of the votes. Stellar Lumens (XLM) got third place with 8%. IOTA (MIOTA) finished last at 3%.

Meanwhile, Ripple’s XRP has remained below the $0.50 level in the past two weeks, showing little momentum in either direction.