Bitcoin tumbled on Monday to an 18-month low under US$25,000 as investors shunned risky assets in the face of a global markets selloff.

The world's most popular cryptocurrency dived about 10 percent to hit US$24,692 in morning London deals, striking a level last seen in December 2020.

World stock markets have plunged since Friday when data showed US inflation at a fresh four-decade high, increasing recession fears.

"The correlation between the equity markets and bitcoin continues to" gain strength, said AvaTrade analyst Naeem Aslam.

The virtual unit has collapsed 65 percent in value since striking a record peak in November 2021. (AFP)