Is it a good idea in your opinion for me to wait for ethereum price to increase so I can sell it and move the money to more alt coins or should I just move the current amount of ethereum to other altcoins right now? 
many people suggest diversify your investment, so it's a good choice for you. if you get big profits from selling your Ethereumyou can buy other altcoins as another option for trading. but you can trade ethereum only, if you just trust on Ethereum