Someone sold Bitcoin for 10% of the going price - probably by mistake
An "oops" moment for someone on Binance BTCUSDS pair They probably placed a sell order for $700 instead of $7000
$60,000 USD worth of Bitcoin sold for $5,600.
Despite being a bit funny, this is also really annoying Exchange should always sell to the highest buy price even if you entered a lower price.
Be careful when placing orders. Stop and take your hands off the keyboard and read it a few times, comparing the price to the current price, before clicking BUY