Personally if a I had a few grand to spread about I would look at coinmarketcap.com and just throw my cash into the coins that took my fancy.
BTC, LTC and ETH are top dogs - you cant go wrong really by buying into those.
I would also look for cheaper coins and look to broaden my portfolio so that I have a spread of investment.
Hope this helps.
Regards
Thank you for guys for your valuable insights. I am buying few of top currencies for the start. Also looking in to proof stake coins but I am not sure if they would be profitable or not but I read some guys are really making or will some bucks there