Everyone has their own choice, and i think that it also depend  on your study, you need to study the market if you are going to choice a coin for investment, to me my person view is that Etherium and Cardano will be the best choice to invest money in. Etheirum i the best choice but due to high price as compare to other crytpo currencies one can buy a limited amount of Etheirum as compare to ther crytpo currencies.