As for trading, not that it is not a get rich quick, but you should use the money that you can afford to lose. The man may wanted to return that money, but crypto and meme stock trading landed him in prison.
Read further about it: Ex-CFO who stole $5M to trade crypto and ‘meme stocks’ gets 3 years in prison
I have met such financial directors who believed that the free cash of the company should not be kept in a deposit account, but should be used for high-risk investments (for playing on the Forex market, for buying "junk" bonds, for buying cryptocurrencies).
At the same time, such financial directors sincerely believed that they were doing a great service to the head of their company.
However, this is a big mistake. The goal of any company is to make a profit from entrepreneurial activities. Even at the stage of creating and registering an organization, the owner of the company chooses the types of entrepreneurial activities that he wants to engage in.
Ordinary organizations are not created to make investments.
The employees of such organizations do not have the necessary experience to carry out such activities. Such activities should be carried out by specialized investment funds.