> authorities can seize funds on this centralized ledger in numerous ways
This has nothing to do with centralisation or decentralisation. Cops can seize your physical foreign currency, gold, and yes, Bitcoin. Being able to seize something is a function of power, not topology.
> IRS can issue a summons for financial records to any US bank without any court order or justification
This is wrong. IRS summons are an administrative procedure that requires notice (with justification) and can be “quashed” [1]. In some cases they can notify you ex post facto, but that lowers the burden for quashing. To be sneaky they need to loop in Justice.
You’re continuing a pattern of issuing confidently worded, starkly incorrect readings of U.S. financial law.
> best they get to is that 50 mining operations control almost 50%
Count the number of people required to make decisions in this system. That’s political centralisation. A smaller number of people have absolute control over Bitcoin, through their control of mining operations and holdings, than comprise a majority of the Congress plus one (the President).
