Bitcoin tumbled Monday to an 18-month low under $25,000 as investors shunned risky assets in the face of a vicious global markets selloff, months after the cryptocurrency hit a record high.

The unit took a heavy knock also from news that cryptocurrency lending platform Celsius Network paused withdrawals, citing volatile conditions.

World stock markets have plunged since Friday when data showed U.S. inflation at a fresh four-decade high, increasing recession fears and sending investors running for safer assets like the dollar.

"It is not very surprising to see such a strong downturn as we have noticed an increased correlation over the last few years between traditional stocks, which have also tanked recently, and the cryptocurrency market," noted XTB chief market analyst Walid Koudmani.

The world's most popular cryptocurrency dived about 10% to hit $23,794 in morning London deals, striking a level last seen in December 2020.

The virtual unit has collapsed by 65% in value since striking a record peak of $68,991.85 in November.

Investors on Monday sought safety with the U.S. central bank seen likely to aggressively ramp up borrowing costs further to combat runaway inflation.

Bitcoin's decline accelerated after the news from Celsius Network.

"Today we are announcing that Celsius is pausing all withdrawals, swap, and transfers between accounts," the platform said in a statement.

Celsius made the move "due to extreme market conditions," it added.

The total value of customer deposits had already shrunk by more than half to under $12 billion in May compared with the end of last year.

$1 trillion market

Koudmani said further falls for bitcoin "may trigger a cascading effect of liquidations of hedging positions" taken against the cryptocurrency.

The global crypto market, comprising other virtual currencies which are tanking such as Ethereum, is worth about $1 trillion, according to crypto data aggregator CoinGecko.

That is down from a level of more than $3 trillion at its peak seven months ago, when the market rode a wave of massive investor demand amid growing acceptance from large financial institutions.

In a sign of the growing importance of cryptocurrencies, two countries, El Salvador and the Central African Republic, have taken the gamble of adopting bitcoin as legal tender – despite strong criticism from international financial institutions.