I don't trade coins though but I assume its less risky to stick to the coins that are already on top and has been traded regularly.
The great thing with yobit is that you can get free new coins to test its waters.
It means a lot, choosing the best coins is the best option in trading. Trading is not easy because there is more risk by investing in a coin but choosing the best may limit our risk.
I totally agree its not really easy to trade coins right now. Before you start trading you should be able to determine which coins that will make you good profit. Make a research first before taking a risk.