If you want to looking for the best crypto to invest $1000 i can answer that Bitcoin is the best of choice that safe but it will just bring a little profitable. If you are risk and want to get big profit then you should buy good altcoins when they start presale ICO . i can recommend some good project:

Genesis Vision: Genesis Vision is the platform for the private trust management market, built on Blockchain technology and Smart Contracts. ICO date:    15.10.2017 — 15.11.2017
ARToken : Decentralized AR/VR ecosystem for 3D content exchange.
ICO date:    25.10.2017 — 22.11.2017