One of the increasingly important topics for professional investors in the world of crypto and investment is environmental sustainability and energy efficiency. In particular, consensus mechanisms based on high energy consumption, such as proof-of-work mining, lead to critical discussions regarding carbon footprint and environmental regulations, which can also affect investment risks. Institutional investors and long term portfolio managers are trying to optimize their investment strategies while also being careful to fulfill their environmental responsibilities by preferring mining operations that use green energy and environmentally friendly alternative consensus models, for example, projects that have proof-of-stake.