Multiple specialized data sources (Blockchain.com, Bitcoin Magazine Pro, Bitbo.io) corroborate that the percentage of 'profitable days' for Bitcoin has consistently been extremely high. This metric measures the number of days in the past where the price was lower than the current price. Given Bitcoin's significant long-term price appreciation, this figure is often above 99.5%. One source explicitly cites a figure of 99.98% (5,441 out of 5,442 days) at a specific point in time, directly supporting the statement.