The ability to buy or sell a financial asset varies from instrument to instrument. This is called “liquidity”.
Some instruments, especially crypto currencies, can be less liquid than others.
To make Fantasy Finance even more realistic, we adjust the amount of an instrument that can be bought or sold based on the liquidity of the underlying instrument.
This means that you won’t always BUY or SELL the percentage of your Fantasy Portfolio that you intended. You might get a “partial fill” instead.