• Bitcoin surged as much as 7.5% on Thursday, to $40,094.81.
• The red-hot cryptocurrency has seen immense volatility in recent days, with thousands of dollars per coin added and wiped out across short periods.
• Thursday's surge comes after European Central Bank boss Christine Lagarde called for more regulation the prior day.
• Morgan Stanley analysts say bitcoin focus "unsurprising" given low bond yields
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Bitcoin rose sharply once again on Wednesday evening and Thursday morning, climbing past the $40,000 mark.It has been a volatile few weeks for bitcoin, with its price hitting an all-time high of close to $42,000 last week before paring.

The price has consistently swung around 10% a day as investors buy in and cash out of the cryptocurrency, which has surged more than 330% in a year.

Bitcoin climbed as much as 7.5%, to $40,094.81. Its smaller rival Ethereum rose 7.2% over 24 hours to $1,160.The dramatic rise in the price of bitcoin and other cryptocurrencies has sharply divided market opinion, pitting much - although not all - of the financial establishment against a new breed of online investor.


On Wednesday, European Central Bank boss Lagarde said Bitcoin needs to be regulated on a global level and linked it to "totally reprehensible money laundering.

"Read more: The CIO of a $500 million crypto asset manager breaks down 5 ways of valuing bitcoin and deciding whether to own it after the digital asset breached $40,000 for the first time

She said bitcoin is not a currency, as many of its proponents argue, but a "highly speculative asset which has conducted some funny business".Bambos Tsiattalou, a financial crime lawyer at London's Stokoe Partnership Solicitors, said tighter regulation would be a major problem for cryptocurrencies.

"Many people buy Bitcoin and other cryptocurrencies because they are worried about and don't trust fiat currencies," so greater regulation would demolish much of their appeal, he said.

Read more: Cathie Wood's ARK Invest runs 5 active ETFs that more than doubled in 2020. She and her analysts share their 2021 outlooks on the economy, bitcoin, and Tesla.

Yet despite raised eyebrows from regulators and central banks, the soaring price has caused some institutional investors to buy in.

Analysts at Morgan Stanley said in a note:

 "With the large decline in the dollar, deeply negative real yields and continued policy uncertainty, investors have been looking for alternatives to traditional cash holdings.

"They added: "Innovation in digital assets continues rapidly and will likely drive increased
institutional participation over time."Yet the analysts cautioned that "the perception of 'value' and demand can vary materially, for example due to changing regulations."