I was searching coinmarketcap for coins that have signup link on their website. I found bytecoin and cryptonex. I signed up with them and invested small amount. Then they fall in long term. cryptonex goes down from 5 usd to 2 usd and bytecoin is playing with 0.0030 to 0.0015.

Everything is falling for couple of months. I asked cnx support team about the rate up-down and they said it depends on floating. Can anyone suggest me how the rate of these type of coins up-down? Actually I want to invest in good coins. Can anyone advice me reliable coins that has their own signup system with client area where i can purchase and store coins in my own client area in their website?