NEW YORK (REUTERS) - Tesla chief executive Elon Musk on Saturday (Nov 6) asked his 62.5 million followers on Twitter in a poll if he should sell 10 per cent of his Tesla stock.

"Much is made lately of unrealized gains being a means of tax avoidance, so I propose selling 10% of my Tesla stock," Musk wrote in a tweet referring to a "billionaires' tax" proposed by Democrats in the US Senate.

Musk tweeted that he will abide by the results of the poll, whichever way it goes.

The poll received over a million responses in three hours since he posted it, with 54 per cent of respondents approving the proposal to sell the shares. The poll is scheduled to end around 3pm ET on Sunday (4am on Monday, Singapore time).

Musk's shareholding in Tesla comes to about 170.5 million shares as of June 30 and selling 10 per cent of his stock would amount close to US$21 billion (S$28 billion) based on Friday's closing, according to Reuters calculations.

Analysts say he may have to offload a significant number of shares anyway to pay taxes since a large number of options will expire next year.

The comments from Musk comes after the proposal in the US congress to tax billionaires' assets to help pay for President Joe Biden's social and climate-change agenda.

Musk is currently the world's richest person and owner of several futuristic companies, including SpaceX and Neuralink. He has previously criticised the billionaires' tax on Twitter.

His tweet raised some eyebrows in the world of finance.

"We are witnessing the Twitter masses deciding the outcome of a $25B coin flip," Venture investor Chamath Palihapitiya wrote on Twitter in response to Musk's tweet.

"Looking forward to the day when the richest person in the world paying some tax does not depend on a Twitter poll," Berkeley economist Gabriel Zucman tweeted.

Musk got into trouble with a tweet about Tesla in 2018.

The US Securities and Exchange Commission sued him after he tweeted that he had "funding secured" to take Tesla private at US$420 a share. The agency said the tweet, which sent Tesla's share price up as much as 13.3 per cent, violated securities laws. Musk later reached a deal with the SEC to end the dispute.

"Note, I do not take a cash salary or bonus from anywhere. I only have stock, thus the only way for me to pay taxes personally is to sell stock," Musk said on Twitter.

Tesla shares recently hit record high after it received its biggest-ever order of 100,000 electric rental cars from Hertz.

Tesla board members, including Elon Musk's brother Kimbal, have recently sold shares of the electric carmaker. Kimbal Musk sold 88,500 Tesla shares, while fellow board member Ira Ehrenpreis sold shares worth more than US$200 million.

Musk recently said on Twitter he would sell US$6 billion in Tesla stock and donate it to the World Food Program (WFP), provided the organisation disclosed more information about how it spent its money.

Musk and WFP head David Beasley have been engaging in a heated debate since Beasley last week challenged billionaires to give more of their wealth to end hunger.