* Bitcoin slumps 19% to one-week low of $30,699
* Ethereum down 23%
* Falls come as rising U.S. yields lift dollar
LONDON/SINGAPORE, Jan 11 (Reuters) - Bitcoin plunged more than 19% to a one-week low on Monday, putting the cryptocurrency on track for its biggest one-day drop since March as its recent red-hot rally hit the buffers.
Bitcoin slumped $30,699, its lowest since Jan. 5, after extending earlier losses in Asian trading hours and was last down 15% at $32,675.
If sustained, the one-day drop would be the biggest since COVID-19 caused chaos in financial markets in March.
The falls reflect a wider dollar bounce against major fiat currencies as the prospect of higher U.S. interest rates tempers popular bets against the dollar.
Second-biggest cryptocurrency ethereum which often moves in tandem with bitcoin, fell as much as 23% to a one-week low of $985.
Interest in bitcoin has been soaring as institutional investors began buying heavily, viewing it as both an inflation hedge and as exposed to gains if it became more widely adopted.
The cryptocurrency more than doubled in price from early December to a record $42,000 on Friday, leading some investment banks to warn of an impending bubble.
BofA said last week the world's popular cryptocurrency "blows the doors off prior bubbles", such as the dotcom boom, China in the 2000s and gold in the 1970s.
J.P.Morgan strategists, however, said that bitcoin has emerged as a rival to gold and could trade as high as $146,000 if it becomes established as a safe-haven asset. (Reporting by Tom Westbrook; Editing by Himani Sarkar, Lincoln Feast and Alexander Smith)
