TY JOUR TI Analysis and evaluation of market manipulations in the segment of digital assets and decentralized financial pyramids KW crypto market KW manipulation KW financial pyramids KW speculation KW volatility KW risks KW security KW first echelon KW insider information JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Verzhakovskaya, M.A. AU Gostev, D.V. AU Korolev, A.A. PY 2025 IS 0 PB ITBO University