you have company A. you are the only employee, you working for bank as a contract.

at the same time, company A invests on company B (your friend owns it) to write a bla-bla-bla software. because you believe this software would have a bright future, you invest almost all the income of company A.

company B did write some software (might got most code from open source), and try to sell it, not likely as successful as you thought, all your hard earned money just gone....

understand?