Yes you can invest at this level too in Ether and if you feared about price then you can invest 50% of your capital here and remaining 50% when Ether comes 1100$ level. You have seen that Ether have consist growth and Ethereum is an open software platform based on blockchain technology that enables developers to build and deploy decentralized applications.And now a days you can see many many ICO coming with Ethereum platform.So it looks Ether future is very bright you can invest.