Illicit Crypto Transactions Hit All-time High of $14B in 2021

Criminal activity surged last year — but represented all-time low 0.15% of crypto transaction volume

article-image

Blockworks exclusive art by axel Rangel

share

key takeaways

  • Illicit transaction volume increased 79% year over year while total crypto volume rose by 567%, according to Chainalysis
  • Cybercriminals have laundered roughly $33 billion worth of crypto since 2017

Illicit crypto transactions reached an all-time high $14 billion last year, but criminal activity’s share of cryptocurrency transaction volume has never been lower, according to a Chainalysis report published Wednesday.

Although the value of illicit transactions surged in 2021 from $7.8 billion the year before, these nefarious transactions accounted for 0.15% of crypto volume last year, down from 0.62% in 2020, the report said.

Source: Chainalysis Report

Total transaction volume across cryptocurrencies tracked by Chainalysis grew to $15.8 trillion in 2021, up 567% from 2020.

“Given that roaring adoption, it’s no surprise that more cybercriminals are using cryptocurrency,” the report states. “But the fact that the increase in illicit transaction volume was just 79% — nearly an order of magnitude lower than overall adoption — might be the biggest surprise of all.”

Crypto-based crime spiked in 2019 as transactions involving illicit addresses represented nearly 3.4% of crypto transaction volume, the Chainalysis report notes. The PlusToken Ponzi scheme occurred that year, reportedly defrauding investors out of more than $2 billion worth of crypto.

Decentralized finance (DeFi) protocols played a much greater role in laundering illicit funds in 2021, the report adds. Laundering through DeFi protocols increased by 1,964% from the prior year, reaching $900 million.

Cybercriminals have laundered roughly $33 billion worth of crypto since 2017, with most of that moving to centralized exchanges over time.

The amount of crypto that criminals are holding is hard to know, according to Chainalysis, as law enforcement has seized illicitly obtained assets.

The IRS Criminal Investigation team announced in November that it had seized $3.5 billion worth of cryptocurrency in 2021. The Department of Justice also recovered $2.3 million from the ransomware group responsible for the attack on Colonial Pipeline.

More recently, the DOJ announced last week that it had recovered the majority of the cryptocurrency stolen during the 2016 Bitfinex hack, valued at roughly $3.6 billion.


Get the news in your inbox. Explore Blockworks newsletters:

Tags

Decoding crypto and the markets. Daily, with Byron Gilliam.

Upcoming Events

Old Billingsgate

Mon - Wed, October 13 - 15, 2025

Blockworks’ Digital Asset Summit (DAS) will feature conversations between the builders, allocators, and legislators who will shape the trajectory of the digital asset ecosystem in the US and abroad.

Industry City | Brooklyn, NY

TUES - THURS, JUNE 24 - 26, 2025

Permissionless IV serves as the definitive gathering for crypto’s technical founders, developers, and builders to come together and create the future.If you’re ready to shape the future of crypto, Permissionless IV is where it happens.

Brooklyn, NY

SUN - MON, JUN. 22 - 23, 2025

🚀 Build What’s Next — Permissionless IV Hackathon Join us June 22–23 in Brooklyn for the Permissionless IV Hackathon — a 36-hour sprint hosted by Cracked Labs and Blockworks where top builders turn ideas into real products. Come to launch, not just […]

recent research

Research Report Templates (10).png

Research

Kamino has evolved into a full-stack asset scaling suite with V2: unlocking new markets, improving capital efficiency, and catering to various risk profiles. We believe it is best positioned to become the credit backbone of Solana as the ecosystem matures. Simply put, KMNO remains our highest-conviction bet in the Solana ecosystem. This report lays out our thesis.

article-image

Bybit’s Byreal, Binance Alpha and Coinbase’s DEX integrations

article-image

This isn’t the worst hack to ever hit Mt. Gox, but it could be the most entertaining

article-image

Crossover’s CEO discusses institutional interest and how over-the-counter (OTC) trading has picked up in crypto

article-image

Sponsored

This collaboration signifies a major leap forward in expanding the reach and utility of Web3 gaming within the vibrant Asian market

article-image

Asymmetric information is threatening crypto the same way it once threatened equities. Disclosure might be the fix.

article-image

Rate cuts drift into Q4 limbo as markets pretend everything’s fine