What is drift value?

Excuse me, could you please clarify what exactly is meant by "drift value" in the context of cryptocurrency and finance? Is it a specific metric or concept used to assess the stability or volatility of a digital asset's value over time? How does it differ from other measures of market performance, and what significance does it hold for investors and traders alike? I'm keen to understand the nuances of this term and how it impacts decision-making in the industry.