A person's net worth is the value of their assets minus their liabilities. Elon Musk, the CEO of Tesla, SpaceX, and X, has experienced a substantial decrease in his net worth due to a decline in Tesla's stock value. Despite these losses, he maintains his position as the world's richest person. - Elon Musk's net worth has decreased by between $52 billion and $116 billion since the beginning of 2025. - The primary driver of this decline is the significant drop in Tesla's stock value, with some reports indicating a decrease of over 40%. - Despite these substantial losses, Elon Musk remains the wealthiest person in the world, according to the Bloomberg Billionaires Index. - Tesla's market value has decreased by approximately $600 billion since December of the previous year. - Market analysts suggest further declines, but Tesla's innovation and upcoming affordable models may help stabilise its future growth.