It obvious that higher trading volum = more liquidity. liquidity refers to the ability of a coin to be converted into cash or other coins easily. Liquidity is important for any tradeable assets including cryptocurrencies.
Unfortunately, I have obversed that most coins listed this days on certain exchanges are without volume, that is, illiquid.
It is very clear that this situation was not common found before 2019.
What could be the reasons for this abnormalities. Your thoughts.
Answer is too simple, these coins are about to be dead as there isn't any demand for these coins in the market now but it was not like this from the start. These coins used to have a large liquid market when they were listed on these exchanges but with time they started getting oversold and interest over time declined, most probable reason would be that the developers didn't perform well and were just selling their stash to move on to another project and with time people also caught up and now the exchanges are only having the coin listed without any trading volume or demand and in some time these coins will be delisted from these exchanges.