Similar to: https://cointelegraph.com/news/signs-point-to-inside-job-in-...
or: https://dailyhodl.com/2019/04/01/inside-job-19-million-bithu...
The timing seems suspicious too. When most of crypto land was crashing. My theory is that this exchange simply didn't have enough liquidity when the price crashed and they simply siphoned off the hot wallet. Lots of people wanted to sell at once. Bitmart did not have these funds. A hack at the same time is just too convenient.
Watching the Ether address get drained in real time yesterday was surreal to see, like out of a movie: https://etherscan.io/address/0x4bb7d80282f5e0616705d7f832acf...
This whole space is full of scams and exchanges that know everything about you in terms of what limits you've set to buy/sell, the order book, liquidity, etc. And worse, they can bet against you. Alameda admitted yesterday that they ended up profiting quite a bit being short BTC Futures (long spot) because the spread collapsed (Source: https://twitter.com/AlamedaTrabucco/status/14672197504891412...)
Only tight regulations can save investors because these "hacks" are way too common. And don't even get me started on Tether ( who conveniently printed another billion after the liquidations were done: https://twitter.com/whale_alert/status/1467155858228494353 )
Edit: rofl, they just printed another $1 billion, on a weekend!
https://twitter.com/whale_alert/status/1467504581571751940
It's funny how brazen they've become.
Not to mention Bitfinex and Tether CTO implying the dip was done after they printed: https://twitter.com/paoloardoino/status/1467053381072138240
Everything in this space seems so shady. But the regulators don't seems to give a damn and keep kicking the can for eternity. It's the wild wild west out there.
Moral of the story: Not your keys, not your coins. Do not keep your coins on exchanges.