This depends on how much money the company has. Is it company money or inherited money from his father?

I think your friend needs to divide the company's money in the bank into several priorities, such as: capital reserves, emergency reserves. If the company has remaining money from mandatory reserves, it can be used for investment. He also needs to divide investments into at least two things, such as low-risk investments and high-risk investments.

I know bitcoin has a high rate of return on investment, but bitcoin falls into the high-risk investment category. This is not a good choice for small company investments unless the company already has strong financial reserves.