The news was reported by the British Broadcasting Corporation.

Image shows Ruja Ignatova
Image caption, US authorities warned that Ruja Ignatova may have changed her appearance since going missing in 2017

Ruja Ignatova has been placed on the FBI's most wanted list.

A woman believed to be in her 40s is wanted for her alleged role in running a scam.

The fugitive is accused of using the scheme to cheat people out of billions of dollars.

When an arrest warrant was signed for her, investigators began closing in on her.

If you sell the currency to more people, you'll get a buyers commission.

FBI agents say One coin was worthless and never protected by the technology used in other cryptocurrencies.

According to federal prosecutors, it was actually a Ponzi scheme.

Damian Williams, Manhattan's top federal prosecutor, said that she timed her scheme perfectly.

The FBI adds fugitives to its most wanted list when it thinks the general public may be able to help find them.

A $100,000 reward was offered by the bureau for information that leads to the arrest of Ms Ignatova, who was charged with eight counts of wire fraud and securities fraud.

She is the only woman on the list.

Image caption, FBI agents believe Ms Ignatova travels with armed guards or associates

The FBI's announcement on Thursday that they were looking for Ms Ignatova increased the chances of her being caught.

He said it was the biggest development in the case since Dr Ruja went missing.

One of the reasons it has been difficult to find Ruja Ignatova is that she disappeared with at least $500 million, which helped her to hide from the law.

She may no longer be alive due to the fact that she has high quality fake identity documents.

Ms Ignatova has been missing since she boarded a flight to Greece.

According to Jen McAdam, she and her friends and family threw a quarter of a million dollars away.

Ms McAdam said it all began with a message from a friend. The Glaswegian was sitting at her computer when she clicked on the link to join the one coin seminar.

She listened carefully to people talk about how the new coin could change her life.

Ms McAdam said that all of them were very up-tempo and full of passion. You are so lucky that you are watching this seminar. You're at an early stage, and it's going to be like the digital currency of the future. It's going to grow.

It took Ms McAdam a long time to realize it was a scam.

The search for Dr Ruja Ignatova continues, and new episodes of The Missing Cryptqueen will be released in 2022.