If the value of a property is far lower than the Buying Price, it is called “underwater”. This can also happen to a crypto portfolio. If you buy a coin at 0.00008300 BTC and the price falls to 0.00006990 BTC, you are “underwater”. But most of the deflation trends correct themselves during a longer period of time. Therefor a precipitous selling of an underwater portfolio is often imprudent.