We use the conservative BTC footprint estimates from Digiconomist to provide these projections.  In our target profit range of 20% to 40% return per annum, the holding time needed to offset a portfolio fully allocated to Bitcoin (worst case scenario) would be between 3 and 5 years.

Source: Amalia Capital Dec. 2021, Digiconomist, the carbon footprint of Bitcoin (2019, Christian Stoll, Lena Klaaßen, Ulrich Gallersdörfer)