Know that they are very volatile. As they can give huge return, so they can make someone lose if they go the opposite direction. I really need to correct something on your post which I quote below.
Kindly explain the trading process how to work and invite in best coin for the future saving.
Altcoins will rise massively but fall massively. They may disappoint you in a way they will not get to all-time high. Do not gold them in long term. Sell when you make profit already.