I feel like people are talking past each other here. People have different definitions of the same term and are answering it accordingly.
Is Bitcoin "decentralized"? It depends on what you mean by "decentralized".
The term can mean:
1. The data for the ledger is stored in a highly redundant way, making it essentially impossible to lose a transaction.
2. The systems holding the ledger can be governed by multiple separate legal entities, making it difficult for governments to exercise any control over the software.
3. The
way most people use the product is self-custodial, such that they are actually effected by #1 and/or #2.
Hence:
1. Systems (whether they use the blockchain architecture or not) that store the ledger on an insufficiently geographically disperse datastore are "not decentralized". In this sense, Bitcoin is very much decentralized.
2. Currencies that are on networks controlled by a single legal entity, or a small and identifiable number of entities that could easily be captured by a government (viz. all PoS networks like Ether) are "not decentralized". In this sense, Bitcoin is mostly decentralized (although >50% of the hashrate is controlled by only a few companies).
3. "Not your keys, not your coins". Unless you physically hold your private keys on your actual person using your own private storage system (e.g. your iPhone) then you are not using a decentralized product by any definition. Most people today use Bitcoin and other cryptos through a broker or an app that either stores their keys for them, or simply marks their holdings in some central database. In this sense, Bitcoin is not, in the defacto way people use Bitcoin, "decentralized".
I think those saying "Bitcoin is not decentralized" are saying it in the sense of #3.
I think those saying, "
only Bitcoin is decentralized and all other digital currencies are not" are saying it in the sense of #2.
I think those saying that most of the more popular digital currencies like Ether etc. are still "decentralized" are saying it in the sense of #1.
Personally, my own focus is
average consumers and getting digital currencies to be a mainstream mass-appeal phenomenon. Hence my own viewpoint is that of #3 when you ask me this question. My answer to the survey above was, "who cares?" (yes, that was me
), and I answered that way because the customers I focus on definitely don't care, and the market is showing us that at least 90% of the market doesn't care.
I think a lot of the people who answered "no" are, like me, thinking in terms of #3.
People who answered yes are thinking in terms of #1 or #2.