Coins are listed on exchanges to be traded, so it is normal for them not to be suspended,  this may happen for several reasons, some of which are related to liquidity, technical problems, or even legal problems, but this is supposed to be temporary and be resolved quickly so that trading can resume, if coin is suspended on one exchange, such as binance, the problem will be resolved quickly, but if it continues for more than two or three days without an explanation of the reason, it will most likely be delisted soon.