If a coin is traded on many exchanges, then it is liquid, and you can invest in it more safely.
Everyone wants to invest in coins that have good liquidity. But when a coin is known and everywhere it is being traded it is usually very expensive. I prefer to invest in early and little-known projects. Then higher chances to earn!
Those who buy well-known coins on the market for a long time means that he is experienced and has the finances to buy and trade them on stock exchanges