You can buy or sell P3D only in one exchange. The exchange itself is a smart contract: Scam proof, Hack proof, Fool proof.Check the source code
CLEVER FEES STRUCTURE
Every trade, buy or sell, has a 10% flat transaction fee applied. This fee is split between all currently P3D token holders forever!
That Smart contract holds all ethereum ever put into purchasing these tokens. Each adrress will be able to withdraw its entire balance anytime.
PoWH3D started as a joke stating that you will lose the money you invest because every ponzi or pyramid dies. Every user is getting paid for the users that join later. If no more users join anymore for some time, impatient ones will start selling their tokens. But the project got so much hype lately with the biggest daily users metric of every decentralized app!
This is an informative website.
This is not an investment advice.