Before revision: This letter expands the studies of the informational efficiency in the cryptocurrency market. Most studies have focused on Bitcoin, the foremost known cryptocurrency, and a few more coins. However, this market is more diverse, with cryptocurrenciesentering and leaving the market on a weekly basis. This letter fills an important gap in the literature, by studying the informational efficiency using a multi-scaling methodology, which represents a new approach.
After revision: This letter expands the studies of the multifractal dynamics in 84 cryptocurrencies. It fills an important gap in the literature, by studying the informational efficiency using a multi-scaling methodology, which represents a new approach.