Chainalysis said cryptocurrency transaction data linked to darknet markets could help predict drug overdose surges months before official health statistics reflect rising deaths.
The firm found that crypto flows connected to darknet drug and fraud ecosystems reached nearly $2.6 billion in 2025, showing that online drug markets remain active despite repeated law enforcement takedowns.
According to the report, payments to fentanyl precursor suppliers fell sharply in mid-2023, followed months later by declines in overdose deaths in the United States and Canada, suggesting a potential lead indicator effect.
Chainalysis said monitoring transactions tied to precursor suppliers could offer three to six months of advance warning before overdose spikes appear in public health data.
In Canadian data comparisons, small crypto payments under $500 showed no clear link to hospitalisations, while larger transfers were associated with rising stimulant-related emergency visits and fatalities, indicating potential bulk purchasing or redistribution activity.
The report also noted that after the closure of Abacus Market in July 2025, activity quickly shifted to successor platforms such as TorZon, highlighting the resilience of darknet ecosystems.
Separately, fraud marketplace volumes fell from about $205 million to $87.5 million year-over-year following infrastructure takedowns, while crypto transactions tied to suspected human-trafficking networks rose 85% in 2025, reaching hundreds of millions of dollars.