I really believe cryptocurrencies. I invested in poloniex ( 3 K usd) made some profit but losing some money for 2-3 weeks.
I just made 4 rigs ( 4 gpus each) to mine altcoins. Recently i am mining ETH with 300 Hashrate.

And additionally i got 6.5 K usd to invest. And i am really confused.

My first choice would be to use money directly to invest in new coins that generates with itself more by holding them ( like XEM)
But i do not know what are these coins available to invest in this manner.

Or i could go all in cloudmining - buying litecoin contracts?

Or i can use poloniex to buy low sell high strategy.

Can you please give any suggestions?