You can say that DRK is a good coin which has potential to increase, but I see that coin/token doesn't have the market, but that coin has its own market which I think it will not be good for people to buy. In my opinion, the good coin should be list on the market when they finish the phase of the project, or they have a short term plan to enter the market, but I don't what other people will say about determining the good coin/token.
To be honest, on the website that you give on how we can buy the coin/token, I think that is too complicated. However, I see that you can explain step by step, but for me, I prefer to buy directly in the exchanges, especially in the popular exchanges.