The coins you have mentioned already are good coins, though I don’t now about the Raven coin. You can still trade with them and build up your money and once the money has grown to a larger amount you can then decide to switch over to other bigger coins like Bitcoin. If you’re trading Bitcoin alone with big amount of money and trading perfectly, trust me, you wouldn’t even need all these altcoins any longer because the profit that will be coming from it is going to be okay with you… that’s as long as you know what you’re doing and trading accurate.