Contrary to all fraudulent projects, there are those that bring investors not a bad income, but they are becoming less and less every day.
How to find a universal technology to find these projects?
This technology does not exist, you just need to be as careful and soberly assess a particular project.
Each project is unique. It should be understood that if the project failed and investors lost their money, this does not mean that the team initially planned a scam project. Its just that development could come to a dead end ... there could be disagreements in a team or something else ... There is no perfect solution for a perfect investment. The main thing is to not forget about the diversification of risks.
Such cases are units. Mostly fraud is done precisely with the aim of robbing people. It is possible and there are cases that the project went bankrupt but this is very rare.