TY JOUR TI COUNTERING "FINANCIAL PYRAMIDS", INCLUDING THOSE USING CRYPTOCURRENCIES: CURRENT ISSUES OF LAW ENFORCEMENT AND FORENSIC ECONOMIC EXAMINATIONS KW "financial pyramids" KW characteristics of "financial pyramids" KW ponzi schemes KW "digital pyramids" KW investigation of "financial pyramids" KW forensic economic examination KW computer-technical examination KW information and communication technologies (ict) KW digital traces KW digital crime KW digital assets KW cryptocurrencies KW crypto investigations KW remote fraud KW financial market fraud JO Bulletin of Economic Security AU OTOGOCHEV, A.V. PY 2025 IS PB Moscow University of the Ministry of Internal Affairs of Russia named after V.Ya. Kikot