if I have to choose from these 2 coins, I prefer ADA Cardano, I have some Bitcoin Diamond, BCD movement is very slow, I am pessimistic to see BCD mining, I am not sure Bitcoin Diamond will be a good investment until the end of 2018.
I agree with your opinion that the development of BTG is very slow and very little possibility to achieve a significant profit. Therefore I need friends opinion here to give me a little support and you have given your best analysis and I am very happy. Thanks a lot.