I want to trade altcoin but I don't know the very coin that will exist and have future. I need guildance to take this step
there are so many potential altcoins today that are worth trading. You only need to look at CoinMarketCap which is currently ranked 20 and above, you only need to check Altcoins in terms of community, smart contract development and altcoin utility.
Potential altcoins are best to invest on, but i think the best coin to trade is the coin that have huge volume in the market.
We can see the daily volume of the coins in coinmarketcap and analyze the price history on the chart so we can choose the best coin to trade.