The data represent the Bitcoin exchange rates.
Recently, it is used by Wang et al. (2023) and fitted a new Dagum model.
References
Wang, Y., Ahmad, Z., Khan, F., Alnagar, D. K., Alsuhabi, H., Alkhairy, I., & Yusuf, M. (2023). Analysis of cryptocurrency exchange rates vs USA dollars
using a new Dagum model. Alexandria Engineering Journal, 64, 645-658.