* Dollar set for first week of falls in three
* Greenback gets no help from Mnuchin tax reform comments
* Poll shows Macron winning French election, euro rises
* Bitcoin hits all-time high
* Graphic: World FX rates in 2017 tmsnrt.rs/2egbfVh
By Jemima Kelly
LONDON, Feb 24 (Reuters) - The dollar hit a one-week low on Friday and was set for its first week of falls in three, as the "Trumpflation trade" that took the greenback to 14-year highs earlier this year faded, and as worries over France's presidential election eased.
The euro, meanwhile, was set for its first week of gains in three, having been lifted by a new alliance between French presidential candidate Emmanuel Macron and fellow centrist Francois Bayrou. That soothed fears that anti-EU, far-right leader Marine Le Pen could win May's election.
A poll on Friday suggested Macron would win 23 percent of the vote share in a first round of voting on April 23, behind Le Pen's 26 percent, but would then win in the final run-off, with a 61 percent share.
The euro rose after the poll, hitting a four-day high of $1.0618, well clear of a two-month low below $1.05 hit earlier in the week.
With little else in the way of new developments, analysts said investors were still focused on comments on Thursday from U.S. finance chief Steven Mnuchin, who said any steps the new administration takes on policy would probably have only a limited impact this year, and that he wants to see tax reform passed by August.
The comments, made in Mnuchin's first televised interviews since taking office last week, suggested that much work was still needed on key elements of the sweeping tax reform plan, one of the policies investors had been reckoning would boost consumer prices and drive up U.S. interest rates.
"To me one thing that stood out was his saying that the tax reform was probably only going to be passed by August," said Commerzbank currency strategist Esther Reichelt.
"Trump had signalled he would present something in the next two or three weeks and this had been one of the supportive factors for the dollar and the whole reason why Trumponomics has been so supportive. It being postponed further into the future increases uncertainty."
The dollar fell as much as 0.4 percent against a basket of other major currencies on Friday to 100.68.
It had already been knocked earlier in the week by minutes from the U.S. Federal Reserve's latest policy meeting that were less hawkish than some investors had expected.
"Ultimately outside of the U.S. there is reflation happening and data is looking strong, so perhaps it’s time to just take some dollar longs off the table," said UBS Wealth Management currency strategist Geoffrey Yu in London.
"We need additional information to sustain (the 'Trumpflation trade')."
Digital currency bitcoin hit a record high of $1,220 in Asian trade on speculation that a bitcoin ETF is set to get approval from the U.S. regulator, before edging back to trade at around $1,175 by 1310 GMT.
For Reuters Live Markets blog on European and UK stock markets see reuters://realtime/verb=Open/url=http://emea1.apps.cp.extranet.thomsonreuters.biz/cms/?pageId=livemarkets (Additional reporting by Tokyo markets team; Editing by Hugh Lawson)