Either just keep holding your bitcoins or invest them in some other altcoin. Ethereum is not safe at present. It is in bubble stage. Any moment bubble may burst and price starts falling down again. There are many other altcoins, choose one of them.
Yeah, there are a lot of alt coins, like GBT etc , we have to invest in that coins also as there is a doubt in the price of ethereum, i am sure that in the coming few months the price of ethereum is not going to increase but will fall down.