So keep yourself safe .
Here is would like to teach you to choose perfect coin yourself for Investment for long term and short term .
First of all find out the list of famous coins( by Google search ) in the cryptocurrency market , and then find out those coins which are badly dumped ( you can see at coinmarketcap ) .
And make Investment in those coins only which are low price famous coins ( at dump ) . And then left them until price of those coins get up .
In present time , the best coin to buy and hold is only one i.e bitcoin , which is king of Cryptourrency market and right now its price is going down much and also in September, there are full chances that price will increase .