Ahmad, F. and Purwanto, P. 2025. Bitcoin, LQ45, Gold, and Rupiah Exchange Rate: A Comparative Study for Investment Decisions. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE). 8, 3 (Dec. 2025), 14513-14525. DOI:https://doi.org/10.31538/iijse.v8i3.8751.