I want to invest short on the altcoin. what about you ?

If you want to invest your money for short time so you should keep in mind that here is no certainty to get profit. So if you have much ability to make up your losses then you can invest in here. From my perception you can invest following those coins because those are highly potential profit token in this market situation.
Those are:
1.ETH
2. NEO
3. TRX
4. DCT
5. WAVES
Now you can choose from here i think you will be gainer if you can invest in those. Best of luck.