BitMEX once ruled crypto trading. Now it is shutting down. On September 23, 2026, the exchange that invented the perpetual swap will close for good. The reasons why BitMEX shut down go far beyond the vague review it blamed.

The closing looks calm, not a crash. But three forces pushed BitMEX to quit instead of sell. The same forces now threaten other exchanges too.

1. BitMEX Lost the Market It Built

Why BitMEX Shut Down Began With a Lost Market

BitMEX launched in 2014. It invented the perpetual swap, a trade that never expires. Almost every rival later copied the idea. For years, it was the top spot for leveraged crypto bets.

Then it fell behind. By August 2023, CoinGecko data ranked BitMEX 9th. It held just 0.9% of derivatives trades. Binance had 47.4%.

The slide kept going. This month, market tracker Kaiko put its share below 0.01%. Daily volume was about $400,000. Reuters reported the figures.

Traders go where other traders are. They left for bigger venues. BitMEX handed rivals its share of a market it once led.

2. No Buyer Would Take the Deal

A weak exchange can still be sold. BitMEX could not close a deal.

Crypto researcher Hasu has reportedly followed the firm since 2018. He says the exchange looked for a buyer from February 2025. No sale ever happened. Rivals, meanwhile, raised fresh capital from big finance.

The legal past scared buyers away. US regulators charged BitMEX and its founders in 2020 with weak anti-money laundering controls. All four fought the case, then pleaded guilty. They paid fines but avoided prison.

The bills piled up. A 2021 deal with two US regulators cost $100 million. In January 2025, BitMEX paid another $100 million in criminal fines and received two years of probation. President Donald Trump pardoned the founders in March. BitMEX announced its September shutdown this week.

3. A $270 Million Insurance Fund It Couldn’t Cleanly Sell

What the Insurance Fund and On-Chain Data Show.

Here is the deeper reason. Every leverage exchange keeps a safety pot. It is called an insurance fund. The pot pays out when a losing trade cannot cover itself. In busy times it grows, fed by scraps from closed-out trades.

BitMEX built one of the biggest. On-chain data tells the story. The fund peaked near 37,795 Bitcoin (BTC) in October 2021. Today, it holds about 3,694 BTC. It also holds roughly $30.8 million in Tether (USDT), a stablecoin. That is about 90% smaller than the peak.

BitMEX deliberately reduced the fund in November 2025. Even so, it kept far more cover than its rivals. Its cushion covered 0.88 times open bets. Binance covered just 0.11 times.

The fund was never in danger. On October 10, crypto had its biggest wipeout on record. Traders lost $19.35 billion due to forced sales, or liquidations.

BitMEX barely felt it. Its own report showed just $38.5 million of that on its books. The fund gave up only about $2 million.

So a big, healthy fund sat inside a dying exchange. That raised a simple question. Why keep so much cash in a business that is closing?

Analysts value what is left at nearly $270 million.

Hasu, like Martin, thinks the fund made BitMEX too hard to sell. He warned about its design back in 2018.

“It started as the golden goose, and then became the noose,” the researcher wrote.

Not everyone agrees. BitMEX calls the closure a business choice. On-chain, the fund has not moved since the news. Binance founder Changpeng Zhao (CZ) blamed years of US pressure instead.

A lawsuit landed the next day. Two former users say BitMEX took cash from their forced trades and fed the fund. They want about 623 BTC back in coins, not dollars. They point to a March 2020 outage. Users were locked out for 25 minutes while $800 million in bets were wiped.

“BitMEX announces it’s shutting down on Sept 23… then the NEXT DAY a proposed class action lands alleging the exchange deliberately designed its platform to FORCE LIQUIDATE customers and seize their bitcoin. Coincidence?” posed Ariel Givner, IP & corporate attorney in FinTech.

Who Could Be Next After BitMEX

BitMEX did not blow up like FTX, the exchange that collapsed in 2022. It closed while it still had the money to pay everyone. Even so, its exit is a warning.

The market keeps shrinking to a few winners. In 2023, the top three venues already ran about 78% of trades. That gap is wider now. Small players are getting squeezed.

The ones most at risk look alike:

• They offer high leverage.
• They hold little spare cash.
• They carry legal baggage.
• And they run a few other lines of business.

Much of this trading is also moving on-chain. The top perpetual futures venues there cleared trillions last year.

On-chain is not safe either. A TRM Labs report counted 207 hacks and about $972 million stolen in early 2026. In the October 10 crash, Hyperliquid alone saw $10.31 billion in liquidations.

Regulated rivals are moving in too. Kalshi launched the first US perpetual futures in May. Kraken added its own in June. Coinbase started a year earlier.

One big question remains. Where does the $270 million fund go after September? Neither BitMEX nor Arthur Hayes has said.

The lawsuit may force an answer.

For every other exchange, the lesson is simple. Stay relevant. Keep clean books. Be easy to sell. That may be what keeps you alive now.

Source: BeInCrypto