Lagarde said the ECB's forecasts "remain valid" for now, as they took into account lockdowns persisting through the first quarter coupled with a gradual start to vaccinations.
At Thursday's press conference, former French finance minister Lagarde is likely to also be quizzed about the recent strength of the euro against the dollar.
Lagarde did not provide specific examples of money laundering cases but said she understood there had been criminal investigations into illegal activity. She did not elaborate.
Tech giants Alibaba and Tencent surged in Hong Kong after a report that the US will not bar Americans from investing in them, as it has done for other firms over national security concerns.
Other European government bond yields were also lower, but the drop was more moderate, with peripheral countries roughly in line with the core, tracking U.S. Treasuries.
Lagarde set a similar timeframe to China which launched a pilot scheme in 2020 and is edging closer to launching the world's first sovereign digital currency.
Bitcoin has come out of its niche in recent years and is now bought by ordinary people, investment funds and even large corporations.
(Bitcoin) is a highly speculative asset, which has conducted some funny business and some interesting and totally reprehensible money laundering activity,
The ECB has so far said simply that it would monitor developments in the exchange rate as the euro scaled new 2-1/2 year highs against the U.S. dollar at $1.2177.
When it buys debt from financial institutions on secondary markets, i.e. after the debt has already been issued, the ECB and other central banks effectively lower the rate of interest that countries and companies must offer to obtain funds.
After four days and four nights of wrangling, European Union leaders sealed the deal on a 750-billion-euro ($858 billion) rescue package that will consist of loans and grants for the hardest-hit member states.
Leaders of the 27 EU states are due to meet on Friday to try to hammer out their differences over how the 750 billion euro recovery fund will operate.
"Our assumption... is that the recovery fund ... will come about and will be a strong mixture of grants on the one hand in larger proportion than loans on the other