I have $4,000 to invest.

[jam22]

You must invest bitcoin for the short-term investment and for the long-term is the ethereum.

[Snixer]

I have $4,000 to invest in altcoins . I’m looking to initially invest for the short-term to boost up my money by mid year or sooner then go for a long-term invest after that. Any suggestions on which coins for the short term? long term?

For long term you want some solid coins like Monero or Ethereum. For shorter term gains you should look into ICOs but always do tons of research before investing in them.