Hey, it's time for some basics of accounting. Below are how those going to look like in the books. Assume initially there were $2000 in cash account, nothing in assets.
Cash-Account^^^^^^^^^^^^Assets^^^^^^^^^Asset-Fluctuations^^^^Comments
$2000CR^^^^^^^^^^^^^^^^^$0CR^^^^^^^^^^^$0CR^^^^^^^^^^^^^^^^^^Initial entry/balance
$2000DR^^^^^^^^^^^^^^^^^$2000CR^^^^^^^^$0CR^^^^^^^^^^^^^^^^^^Buying the asset*
$1500CR^^^^^^^^^^^^^^^^^$2000DR^^^^^^^^$500CR^^^^^^^^^^^^^^^^Selling asset with a loss*
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$1500CR^^^^^^^^^^^^^^^^^$0CR^^^^^^^^^^^$500CR^^^^^^^^^^^^^^^^Final balances
You can see that for each transactions, the CR/DR amount are always matching, but the money flows to different accounts. After those two transactions, the company still has $1500 in cash, and realized a $500 loss, but the sum of all account balances is still $2000CR.
Given the huge amount of transactions and the rounding associated with taxes, thus there might be very small discrepancies between CR entries and DR entries, and that's only legit reason money vanished from accounts. I would expect such amount is no more than a couple of hundred dollars, even take a step back thousands, that's still heaven and hell differences. I cannot find a reason other than fraud can lead to such a big hole.
Cash-Account^^^^^^^^^^^^Assets^^^^^^^^^Asset-Fluctuations^^^^Comments
$2000CR^^^^^^^^^^^^^^^^^$0CR^^^^^^^^^^^$0CR^^^^^^^^^^^^^^^^^^Initial entry/balance
$2000DR^^^^^^^^^^^^^^^^^$2000CR^^^^^^^^$0CR^^^^^^^^^^^^^^^^^^Buying the asset*
$1500CR^^^^^^^^^^^^^^^^^$2000DR^^^^^^^^$500CR^^^^^^^^^^^^^^^^Selling asset with a loss*
--------------------------------------------------------------------------------------------
$1500CR^^^^^^^^^^^^^^^^^$0CR^^^^^^^^^^^$500CR^^^^^^^^^^^^^^^^Final balances
You can see that for each transactions, the CR/DR amount are always matching, but the money flows to different accounts. After those two transactions, the company still has $1500 in cash, and realized a $500 loss, but the sum of all account balances is still $2000CR.
Given the huge amount of transactions and the rounding associated with taxes, thus there might be very small discrepancies between CR entries and DR entries, and that's only legit reason money vanished from accounts. I would expect such amount is no more than a couple of hundred dollars, even take a step back thousands, that's still heaven and hell differences. I cannot find a reason other than fraud can lead to such a big hole.