The cost of 47, holding 9 million coins, sold half when it rose to 58, how much am I losing now?

$DOGS said too much is meaningless. For this kind of wash trading, don't expect it to rise; any rise is just to trap more retail investors. If you can't see that clearly, then you're not suitable for trading cryptocurrencies. The outcome for this kind of coin is delisting and going to zero, so shorting will never lead to losses.