The only barrier to entry for a Bitcoin miner is that you have to have an Internet connection and a computer<i>.  That is completely decentralized; anyone can buy a computer and Internet access.  I don&#x27;t understand your point.  Surely any system you were proposing would require that as well.  Your comment was talking about a blockchain amongst &quot;organizations in an industry that validate transactions amongst each other&quot;.  That seems like it would require a barrier to entry to me, namely, that you would have to validate to someone that you were actually so-and-so organization in so-and-so industry.  Can you more fully flesh out your proposal?  I&#x27;m seeing additional barriers to entry, requiring centralization, that Bitcoin does not have.<p></i> In practice you probably want a special purpose computer that is GOOD at calculating SHA256 hashes.  But anyone can acquire these without limitation or restriction.