This is normal because many ICO teams have no plans to develop projects after raising enough funds, resulting in tokens without any storage value (no potential).
I don't think that is the reason, I believe they have plans but even if they have great development, they cannot market their product right due to the bear market. People are not buying now, they remain calm and wait for the market to normalize, when this changes to uptrend, I'm sure they'll be buying again.