Bitcoin mining firm MARA Holdings allocated $4.3 million for the personal security of CEO Fred Thiel in 2025, reflecting a significant increase in security spending amid a surge in crypto-related attacks. This expenditure included $430,780 for vehicle armor and other protective measures. In comparison, the company's security expenses for Thiel in 2024 were $191,040. Additionally, MARA spent $3.9 million on security for CFO Salman Khan in 2025. The rise in security costs comes as "wrench attacks" targeting cryptocurrency executives and investors become more prevalent, prompting companies to enhance protective measures for their leadership.