You have $1,000 to put into 3 Altcoins for the biggest ROI. Your options are...

[kuckoh]

CoinDash - will move upwards after china fud passes
0x - huge dex potential
kyber - vitalik influence, mega hyped

[cryptofunn]

For 1000$ I'd break at least 5 altcoins. Risks of loss of Deposit is significantly reduced. Here are 5 altcoins I invested:
chelle, OMG, dash, games, hem

[bitcoinisbest]

I would invest in ETH which is not mentioned though, other coins would be Civic, OMG and Dash. Seems to me this have potential for future survival and retain its good price among exchanges. Also their demand in coming time may increase as btc is getting expensive for people so they are shifting to altcoins having lesser price.

[misurending]

Waves
Ark
0x

[HODL to the moon]

I am for PIVX, ARK and HEAT right now. They all have promising roadmaps and hopefully a bright future ahead

[cryptothinker]

You guys should stop buying garbage and learn the basics of economics. Most of these coins are not only premined, but they have highly centralized supply. Some of them have a supply in the order of billions of coins, which explains why they are worth pennies.

[SadelmShumake]

1000$ for waves . Unique platform, good idea, good security,good technology but simply to use,   

[twobits]

Currently I think I will go with Zcash and Neo because the two of them started making a nice recovery and I think that soon the both will go to moon,  I am expecting to see a big jump in the price.

Zcash with the anonymiti technology and neo with the gas emision to generate the dividend by the users or token holders, But the neo just makes me interesting right now. The token already pumped a lot.
I agree with both of your choice.

[bitofc]

3 years from now is a long time, I would pick
NEM, STRAT, CVC

Current price
NEM 0.00005871 ($0.23)
STRAT 0.00114 ($4.48)
CVC 0.0000982 ($0.39)

[oli123]

I would invest 1,000 dollars in these three altcoins for a max ROI:
STRATIS
NEO
WAVES
I would add other coins to the introductory question. For example, Ethereum or some new Ethereumdark and Deeponion coins.