Why did REI collapse?

Can you explain in detail the reasons behind the collapse of REI? Was it due to a lack of regulation in the cryptocurrency market? Or was it because of the company's internal mismanagement? Did investors lose confidence in the project? Was there a technical failure that led to the downfall? What steps are being taken to prevent similar collapses in the future? Understanding the root causes of REI's collapse is crucial for the health and stability of the cryptocurrency market as a whole.