how many different coins i will buy for trading?
is it good to buy and sell 1-6 different coins or just stick to 1 kind of coin?
what coin and what was the best coin that i can be hold for a long time that give me good profit. can i have your suggestion, thanks and gobless !

First you need to learn about money management before trading. It's ok to trade 5-10 coins at the same time, some coin can be more profitable then others.