Go here
CoinMarketCap.com. Pick any coins that are in the top 10. Study it and do some research since you are investing in it and you don't want to blame anybody else just because they told you to invest in some coins.
Always do a research before investing because your money is on the line here not ours.
How much the money for this investment, i think we need a medium/high investment for this cryptocurrency. Better new startup/cryptocurrency we can invest with a low investment. If we invest on top 10 cryptocurrency the profit not really worth with the risk. For me i really like new startup went the price like a shitcoin. Like x-cash i invest on 30 litetoshi and the coin make a new ATH at 85 litetoshi.