...But still we should be care about choosing the company just because an American company it doesn't guarantee 100% that there is no possibility of fraud.
There can be example these companies like- WorldCom, Enron etc
Of course, every investor is responsible for the safety of their capital and should carefully approach the choice of a campaign to invest in. But in the examples you gave with WorldCom and Enron, the management of these companies received real terms of imprisonment, which ranged from 6 to 25 years in prison.
But in the examples you gave with WorldCom and Enron, the management of these companies received real terms of imprisonment, which ranged from 6 to 25 years in prison, and the investors, although not in full, received compensation through the courts.