"I see the promise of these new technologies, but I also see the reality: Cryptocurrencies have been used to launder the profits of online drug traffickers; they’ve been a tool to finance terrorism," Yellen said.
The letter also asks whether DLive identified any crypto donations from foreign entities to the individuals present on Jan. 6.
Chainalysis declined to directly link the donation to the Jan. 6 storming but said the timing "warrants suspicion."
A legal non-profit accuses the platform of failing to moderate accounts and allowing extremists to collect donations.
Blockchain-based live streaming service DLive has seen a 67 percent increase in users since popular YouTuber PewDiePie joined the platform in April.
PewDiePie, the world’s most popular YouTuber by subscriber numbers, is to live stream weekly on blockchain-based platform DLive.