But should it be called Sister Fifty Thousand?

In 2018, Binance did not have contracts yet, and the contract battlefield was only OKEX and BitMEX, with OKEX being the absolute leader in the market. At that time, the contract mechanism was not perfect:
No ladder margin guarantee: large holders with tens of thousands of coins and small retail investors with a few hundred can both fully leverage 20 times
No automatic position reduction (ADL): if a liquidation order is too large and no one takes it, it will hang on the order book (commonly known as 'corpse')
Collective liability (loss sharing): if this 'corpse' ultimately cannot be executed, the resulting loss is shared proportionally by all profitable users on the platform
This is also the core loophole for 'Fifty Thousand Brother' manipulating the market