As of November 2017, there are over 1300 established cryptocurrencies in the world, with hundreds more being launched or preparing to launch. It is impracticable to invest in all of them and surely, not all of them will succeed. To pick the right crypto, the investors have to do their own due diligence.
this is a good post that explain key metrics every responsible investor should understand about any cryptocurrency before investing money
https://blog.digitalassetdb.com/cryptoc ... investing/