Prime bank instruments do not exist and generally the sellers divert the money for their personal benefit. Large payments over a short period of time. Sign of Pyramid or Ponzi scheme. If little information is given, and you find out nothing by contacting the company, you should be skeptical. Legitimate companies should not ask you to keep secrets, and should not keep secrets from you.
All investments carry some risk.
If it seems impossible then it probably is. Matrix programs Sign of a Pyramid or Ponzi scheme. Legitimate matrix programs will have an actual product for sale, but make sure it is not grossly overvalued. Scam artists love bulletin boards because they can easily post false information. Advertising the fraudulent opportunities is free.