Using bitcoin properly has nothing to do with the legality of investing in your project. Not getting caught doesn't mean someone didn't do anything wrong; it only means no one knows about your transgressions.

Even if a person were to "use bitcoin properly" and were able to stay anonymous, there is no guarantee they would not make a mistake in the future that would cause prior transactions/addresses to be linked together.

If a person were to somehow address the sanctions issue (that remains outstanding), there is still the issue that your project is screaming scam. If your claim that you are located in Iran is true, if you were to scam someone, there is nothing the person could do about it because suing you would lead to nothing happening. Ditto with reporting it to the police/law enforcement.