Looking at the present situation of the market, it will be a better choice to hold on to your usd or stake it somewhere or even lending is a good option to increase your total value. Alts are not doing well and BTC is going sideways so be cautious about any trades.
The op is looking for crazy coins that can give him like 100× to 1000× profits without stress which is somehow funny with the current situation of the market now. Don't you think this is an act of greed and unrealistic dream which is very difficult to accomplish now. He needs to go learn other skills like trading and others that can guarantee his aim and the kind of profits he's looking for.
Just be patient and wait if you can, for the market to settle down before thinking of investing because there is still probability of the market falling, even in the next three months.