Ethereum is going up and up

From the last month Ethereum start booming up and up upto 715$ and now it is at 703$ what
you think so ? Whether it is great idea to buy it or need to wait for price to go down.
I think it has a potential to cross bitcoin

I do not know about cryptokitties but some people on youtube said that due to these kitties
Ethereum will sky rocket in 2018.

What do you think so comment below?