As you all know about the Bitcoin rate are decreasing nowadays, I'm new to Cryptocurrency so anyone who has knowledge about could tell that which currency has potential and good to invest in 
The subject and the matter of the thread is not matching. What is your actual query? If you talk about the crypto currency price going down, then you must understand that it is the normal dynamics of crypto currency market. So there's nothing to worry about. Also the outlook of the market changes form day to day. So if a crypto coin looks good for invest, that may not be the case tomorrow. Take my example, I have bought ripple when the price was at $3 each. I had some money lying idle in the exchange so bought around 35 ripples hoping the price will go up. But if you look at the current market price of ripple, you will understand I have lost 60% of my investment value. Also ripple has come to the third position from the second and ETH took over the second position. So use your own intuition and invest accordingly and don't forget to diversify.
