Despite Bitcoins strong adoption, brand, and security, it does deserve to 
have an A but the Weis rating system is based on Fundamental Index.

For example here are some of the reasons why Bitcoin scored low to a C+:

Bitcoin falls short in two important areas: 

1. The Risk Index reflects extreme price volatility. 
In a years time Bitcoin's price went from $1,000 +/- to $20,000 +/-. 
As of now bitcoins price is about $11,500 +/-

2. The Technology Index reflects Bitcoin’s weaknesses in  
governance, energy consumption and scalability. 
Most of the biggest mining farms are located in china which makes it 
less decentralized. 

Since this is a new rating service there is room to implement improvements &
in the future, an upgrade for Bitcoin is most likely. I'm bullish with bitcoin's platform 
because once they fix the ridiculous transactions fees and scalability bitcoin 
will have huge improvements.

https://weisscryptocurrencyratings.com/
![K94Cb2NT-e1516623336692.jpg](https://steemitimages.com/DQmRUBk3wmHMmtBoR16oWFg4bNMx6KtVZmVZQBYoijaRpGS/K94Cb2NT-e1516623336692.jpg)