TY JOUR TI DIGITAL RUBLE: INNOVATIVE FIAT REGIONAL ECONOMY KW digital ruble KW monetary policy KW money supply KW aggregates KW cash and non-cash funds KW financial banking strategy KW economic turbulence KW adaptation strategies. JO Scientific Bulletin: finance, banking, investment AU Nalivaichenko, E.V. AU Kirilchuk, S.P. PY 2025 IS 0 PB V.I. Vernadsky Crimean Federal University