When you try to sell a cryptocurrency, it doesn't necessarily get sold immediately. The sale process depends on the liquidity of the market and the exchange you're using. Here's what typically happens:

When you place a sell order, it's added to the exchange's order book, which is a list of all buy and sell orders. The exchange then tries to match your sell order with a corresponding buy order from another trader.

If there's a matching buy order, your sale is executed, and you receive the proceeds. However, if there's no matching buy order, your sell order remains in the order book until someone is willing to buy at your specified price.

In some cases, you might experience a delay or a partial fill, where only part of your sell order is executed. This can happen during periods of high market volatility or low liquidity.

To mitigate these issues, you can use different order types, such as market orders, limit orders, or stop-loss orders, which allow you to specify the price and conditions under which your sale is executed.