Bitcoin has suffered another brutal plunge and could soon pass below $US16,000 ($27,200), bringing the cryptocurrency’s total losses to nearly 20 per cent in two days.

The 12 per cent fall — from around $US18,650 ($31,705) on Wednesday morning to just over $US16,000 on Thursday — was triggered by news that cryptocurrency exchange Binance was “strongly leaning” towards scrapping a rescue takeover of rival FTX.

Industry website CoinDesk, citing a “person familiar with the matter”, reports Binance is now “highly unlikely” to go through with the proposed acquisition after less than a day reviewing the company’s books.

“Binance’s nonbinding letter of intent for the takeover — announced Tuesday as FTX’s financial position appeared to be spiralling out of control — hinged on Binance performing due diligence,” CoinDesk reported.

“Roughly half a day into that process of reviewing FTX’s internal data and loan commitments has led Binance to strongly lean against completing the transaction, the person said.”

Binance has now confirmed the deal is off.

“As a result of corporate due diligence, as well as the latest news reports regarding mishandled customer funds and alleged US agency investigations, we have decided that we will not pursue the potential acquisition of FTX.com,” read the statement.

“Our hope was to be able to support FTX’s customers to provide liquidity, but the issues are beyond our control or ability to help.”

The statement continued, “Every time a major player in an industry fails, retail consumers will suffer. We have seen over the last several years that the crypto ecosystem is becoming more resilient and we believe in time that outliers that misuse user funds will be weeded out by the free market. As regulatory frameworks are developed and as the industry continues to evolve toward greater decentralisation, the ecosystem will grow stronger.”

FTX is yet to publicly comment.

Binance’s statement sent bitcoin plunging further.

Binance co-founder and CEO, Changpeng ‘CZ’ Zhao. Photo / AP

Ethereum has also dropped more than 12 per cent since yesterday and has lost nearly a quarter of its value over the past week, according to Coinmarketcap.

The total cryptocurrency market has lost close to $US200 billion ($340b), from just over $US1 trillion prior to the FTX drama to around $US840 billion ($1,428b).

Earlier, Binance founder and chief executive Changpeng ‘CZ’ Zhao sent a note to employees saying due diligence for the deal was “ongoing”.

Zhao warned FTX going down was “not good for anyone in the industry”.

“Do not view it as a “win for us”,” he wrote.

“User confidence is severely shaken. Regulators will scrutinise exchanges even more. Licenses around the globe will be harder to get. And people now think we are the biggest and will attack us more. But that’s OK, we are used to being open and leaning into headwinds. In fact, we embrace scrutiny. We must significantly increase our transparency, proof-of-reserves, insurance funds, etc. A lot more to come in this area. We have a lot of tough work ahead of us. Not to mention prices swinging wildly.”

He stressed that Binance “did not master-plan this” and that it was “less than 24 hours ago” that FTX co-founder and CEO Sam Bankman-Fried had called him.

“And before that, I had very little knowledge of the internal state of things at FTX,” he said.

“I could do some mental calculations with our revenues to guess theirs, but it would never be very accurate. I was surprised when he wanted to talk.”

Binance - the biggest exchange, accounting for more than half of spot trading volume - confirmed on Tuesday (US time) that FTX was facing a “significant liquidity crunch” and had “asked for our help”.

That followed days of speculation that FTX and sister company Alameda Research, both founded and largely owned by Bankman-Fried, were facing a liquidity crisis, amid revelations Alameda’s balance sheet was too heavily reliant on illiquid tokens, including FTX’s own FTT.

In response, Zhao publicly announced that he would sell his holdings of the FTT, worth $US584 million ($898 million), triggering a near-total collapse of the token, mirroring the Terra/Luna disaster earlier this year.

The FTT token has lost nearly 90 per cent of its value since last week.

Bloomberg columnist Matt Levine said FTX had been caught in a “death spiral” as a result of holding FTT — effectively a stock in the company — as collateral.

“This is completely insane,” he wrote.

“If people start to worry about the investment bank’s financial health, its stock will go down, which means that its collateral will be less valuable, which means that its financial health will get worse, which means that its stock will go down, etc. It is a death spiral. In general, it should not be possible to bankrupt an investment bank by shorting its stock. If one of the bank’s main assets is its own stock — is a leveraged bet on its own stock — then it is easy to bankrupt it by shorting its stock.”

In his letter to staff, Zhao ordered employees not to trade FTT tokens while the deal was ongoing.

“If you have a bag, you have a bag,” he said.

“DO NOT buy or sell. As soon as I finished the call with SBF yesterday, I asked our team to stop selling as an organisation. Yes, we have a bag. But that’s OK. More importantly, we need to hold ourselves to a higher standard than even in banks.”

Bankman-Fried, whose $US16 billion ($27b) fortune was all but wiped out overnight, announced the “strategic transaction” with Binance on Tuesday while promising that his teams were “working on clearing the withdrawal backlog”.

Customers rushing for the exits had reported difficulties withdrawing funds from FTX.

“This will clear out liquidity crunches; all assets will be covered 1:1,” he wrote on Twitter.

“This is one of the main reasons we’ve asked Binance to come in. It may take a bit to settle etc. — we apologise for that. But the important thing is that customers are protected.”

In a letter to investors announcing the proposed Binance deal, Bankman-Fried said his “first priority is to protect customers and the industry”, followed by shareholders.

“I’m sorry I didn’t do better and am going to do what I can to protect customer assets and your investment,” he wrote.

Fawad Razaqzada, the market analyst at City Index and FOREX.com, warned that the turmoil could spread outside the cryptocurrency market.

“Even if you are not involved in cryptos, the turmoil is definitely something to keep an eye on, as it may be an additional factor impacting risk appetite across the financial markets,” he wrote.

Ipek Ozkardeskaya, the senior analyst at Swissquote Bank, was more hopeful, saying if “history is any guide, it should be fine”.

“We will see a couple of days of high volatility and sell-off, but the contagion will likely remain limited, and the survivors will carry on,” she wrote.

“Yet, investors would be, once again warned, that they are operating in a mostly non-regulated industry, and problems could pop up anytime.”

- Frank Chung, news.com.au