Paris: Billionaire Elon Musk swept into Paris on Friday to hold court at an event with thousands of spectators hours after meeting the leaders of Italy and France, as European capitals jostle for investment from his electric car firm Tesla.

The maverick tech titan took to the stage at VivaTech, a huge trade fair, to shouts of “we love you Elon” and defended his record since he bought Twitter and repeated his warnings that artificial intelligence could go terribly wrong.

“My strong recommendation is to have some strong regulation for AI,” he said, without specifying.

On Thursday he met Italian Prime Minister Giorgia Meloni, who tweeted later that their talks had been “fruitful” and they had discussed “innovation and opportunities”.

A day later he was talking to French President Macron, who had earlier promised to “tout the attractiveness of France and Europe” as an investment destination.

Musk and Macron met a month ago and afterwards the maverick boss of SpaceX and brain implant firm Neuralink said he was considering big investments in France.

The country’s technology minister Jean-Noel Barrot fuelled speculation earlier this week by telling US broadcaster CNBC that “a lot of effort and energy” had been expended to secure a Tesla factory for France.

But reports from Spain say Tesla is planning to build a factory there and Italy now appears to be waging a charm offensive.

The electric carmaker’s European footprint is relatively small, having opened its first manufacturing plant in Germany last year.

Europe’s leaders and plutocrats are desperate to get some face time with Musk -- in Paris he had lunch with French magnate Bernard Arnault, with whom he regularly trades the title of “world’s richest man”.

But despite the breadth of Musk’s business empire, it is his acquisition of social media network Twitter that continues to fascinate and baffle observers.

He bought the platform for $44 billion, sacked much of its staff, allowed right-wing conspiracy theorists to return and introduced all sorts of fees and charges.

Advertisers fled the platform and he has admitted the firm is no longer worth anywhere near the amount he paid.

But he told interviewer Maurice Levy, founder of VivaTech, that he was moving Twitter in a “good direction” and claimed to have got rid of 90 per cent of “bots and scams” and similar things and 95 per cent of child-exploitation material.

“Almost all the advertisers have come back or said they’ll come back,” he said.

“I feel optimistic about the future.” Musk is a notoriously tricky interviewee, prone to lengthy pauses, off-topic rambles and making coded references to sex and drugs.

On the stage in Paris, he opened with customary giggles and jokes and when asked what the secret to his drive was, he replied “crystal meth”, before quickly adding that he was joking.

Tesla’s market value is essentially based on vehicle ‘autonomy’, said Tesla CEO Elon musk on Friday, and musk added that he “did not expect that Tesla would be at this level” regarding the company’s stock market value.

“The value of the company is primarily on the basis of autonomy,” musk told the Paris VivaTech event. “That’s really, I think, the main driver of our value.”

He has for years missed his targets to achieve full self-driving capability. Tesla says that what it calls “Full Self-Driving” software does not make its vehicle autonomous and requires driver supervision.

“Although I’ve said this before, I think we will solve autonomy soon,” the billionaire said at the event.

“Even if you have a discounted percentage probability of autonomy happening, that is so incredibly valuable.”

Separately, Tesla’s ambitious plan to boost auto production in Shanghai, its most valuable plant globally, hinges on China’s approvals to develop 70 hectares (172 acres) of former farmland that is currently overgrown with wildflowers.

Once courted by Beijing to help spur the development of a domestic electric vehicle (EV) industry, Tesla may now be a victim of its own success in the world’s biggest auto market, challenging plans to use its cost advantage from Chinese production to power exports.

China’s state planner, the National Development and Reform Commission (NDRC), has been cautious about approving new electric vehicle (EV) production plans by all automakers because of concerns about overcapacity and a deepening price war launched by Tesla, according to executives at rival companies and analysts.