The idea is that no central authority can censor your right to spend money.
I.e. the requirement to report all large cash transactions and prevent anonymity in such deals; the 'know your customer' requirement for cryptocurrency exchanges, etc. Even if your "money" is censorship resistant, transacting with a legitimate business can't be, since all legitimate businesses can be (and are) required to censor certain transactions; and if a particular "kind of money" makes it impossible to distinguish them, then it may well be that these businesses will (or will have to) simply censor the whole "kind of money".
It's worth remembering that cash is no clear panacea. Germany's inflation made it unworkable. Some countries have arbitrarily changed currency. Its value is based on agreement.
A true e-currency would have different problems. It would not necessarily be bad.
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You can also send transactions over any communication, even SMS. A good example from Andreas Antonopoulos is that emoticons are a 128 character set, so you could send a 250 byte bitcoin transaction as a sequence of 15 emoticons.
Good luck stopping that.
Until you realize that >90% of Bitcoin hashing power is controlled by a handful of Chinese guys, and those guys are probably controlled (or can be easily coerced into cooperation) by Chinese totalitarian government.
It's false. You are repeating a sadly misunderstood aspect of pooled mining. Articles writing such sensationalist claims are written by people who don't understand that a mining pool representing x% of the hash rate doesn't mean they "control" x% of the hash rate. Their end-users, who are distributed around the world, are the ones who control the hashrate, who own the mining hardware, and who choose which pool to use. That is, if a pool were to use the hashrate maliciously, users around the world would abandon it and point their miners at more trustworthy pools.
This is not as easy as you try to paint it, because mining requires hardware, and you can't just move it around the world at will - most of it is physically located in China, and that's not gonna change.
It is not true that "most" mining hardware is located in China. There is a good portion of it over there for sure, but because of the secrecy around most miners, we don't know how much exactly. It's certainly not ">90%".
Every single article that makes similar claims mistakenly assumes that for example it the AntPool Chinese pool represents 20% of the hashrate, then it means this hardware is located in China. This is patently false. AntPool is one of the most popular pools for various reasons (reliability, availability, flexibility, branding), so they are used by many users worldwide. They even have stratum endpoints in the US for their North American users. Only a fraction of the AntPool hashrate comes from hardware physically located in China.
Yes, "permission" is the right vocabulary to use in this instance. In fact, the opposite, being "permissionless", is exactly one of the main selling points of cryptocurrencies: no authority can prevent a user from sending or receiving bitcoins, or ether, etc. This is why cryptocurrencies should be seen as competing with cash, and not with permissioned systems (credit cards, Paypal). This is also why, IMHO, countries moving toward a cashless society will inevitably lead to more people—the underbanked and the unbanked—slowly using cryptocurrencies more and more over time, not by choice but by necessity.