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I have my doubts about Bitcoin

25 点作者 citizenkeys超过 11 年前

7 条评论

nwh超过 11 年前
This is woefully uninformed.<p>&gt; <i>There can be only 21 million Bitcoins ever found or mined, though once found ,Bitcoins can be divided into 10^8 small subparts called shitoshis which are what’s actually used for buying things.</i><p>There&#x27;s not really a limit to it. You can increase the precision to 64bit if you really wanted to, 8 decimal places is just arbitrary for the moment. Values below 0.00005 BTC aren&#x27;t even spendable though at the moment to avoid spam, so eight points is hardly a limiting factor.<p>&gt; <i>but on the other hand Bitcoins are inflation-resistant because of constrained supply and can’t easily be counterfeited, either.</i><p>They can&#x27;t ever be counterfeited actually. At one point an integer overflow meant that additional ones were erroneously created, but that&#x27;s been patched since 2009.<p>&gt; <i>Bitcoins, while possibly uncrackable are definitely not unhackable. Mining Bitcoins requires the validation of 90 other random miners before your Bitcoins are judged real and assignable</i><p>120 blocks to mature, actually. The term &quot;random&quot; makes them sound untrustworthy, but there&#x27;s not really much trust put in them either. They could be as malicious as the author.<p>&gt; <i>but what’s to keep me from owning 90+ Bitcoin mining accounts and gaming the system?</i><p>Nothing but the cost of doing so, which is the entire point of miners competing.<p>&gt; <i>What if Amazon Web Services simply assigned all unoccupied EC2 cores to this task?</i><p>Nothing. EC2 rented servers are far too slow to attack the network at this point, that&#x27;s the point of having a faster hashing speed and overall difficulty.
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sidko超过 11 年前
1. It&#x27;s a free market. If it begins to cost more to mine Bitcoin than it is worth (considering all costs into consideration), more people will start exchanging fiat into Bitcoin and fewer people will mine. This will reduce the mining difficulty while increasing the BTC&#x2F;USD rates.<p>2. You got to be kidding. The fastest US supercomputer is about 18 peta flops. The world&#x27;s fastest is about 35 peta flops. The Bitcoin network difficulty crossed 12,000 petaflops or around that range, depending on how you calculate it.<p>3. The first mover advantage is a disadvantage because you might think of a situation where some legal entity in some country might think of outlawing Bitcoin without ever figuring out how to enforce it?<p>4. If finance were about compassion, there wouldn&#x27;t be thousands of people dying of hunger while we have bajillions of tons of food literally destroyed in other parts.<p>You&#x27;ve mentioned the &#x27;bad&#x27; parts, without much merit, IMO. You didn&#x27;t consider the better cases, let alone the best. Everything from escrow payments to digital identity to autonomous agents is encoded in the protocol that is yet to be implemented. Bitcoin isn&#x27;t a gold replacement or a cheaper credit card, it&#x27;s a fundamentally different way of thinking about finance and economics.<p>You should have your doubts about Bitcoin when there&#x27;s a better competitor out there.
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damian2000超过 11 年前
He fails to mention the two biggest weaknesses of Bitcoin (in my uninformed opinion) :-<p>- The stability and security of the various online exchanges<p>- The relative difficulty of converting BC to&#x2F;from cash
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mithras超过 11 年前
&gt;Bitcoins can be divided into 10^8 small subparts called shitoshis<p>Stopped reading there, do some research. First off they are calles satoshis, also that limit is far from hard.
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droopyEyelids超过 11 年前
We&#x27;ve passed the point where superficial (non-technical) analysis of Bitcoin can add anything useful to the discussion.<p>Right now, we need thought put into the permanent, public history of the block chain and how that accountability, fully harnessed, will interface with the power structures of the world. It&#x27;s an unfathomably complex topic.
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JackMorgan超过 11 年前
I read somewhere a post where the author figured the amount of bitcoins the creator likely owns, and that it would be enough to vastly devalue the currency if he ever wanted to sell. I thought it was Schneier&#x27;s blog, but now I cannot find it. Does anyone have the source?
etherael超过 11 年前
This is just wrong. The analysis he links to on the profitability of mining is based on litecoin, he claims it&#x27;s the same, but it&#x27;s simply not.<p>Quick calculations on bare avalon chips with a 100k investment gives a current ROI of <i>4 days</i>, this does not account for risk, does not account for setting up the chips, etc etc etc. However, it is indicative of the idea that the pursuit would be &quot;unprofitable&quot; is pretty insane.<p>The 90+ bitcoin mining accounts giving you the ability to game the system is even worse, it&#x27;s like he doesn&#x27;t have the faintest idea of how bitcoin mining even works. I should go hook up 1000 fake SETI@home accounts and reap the massive kudos for my epic performance this will surely provoke. What the hell?<p>In 3, he goes back to cheerlead for litecoin, even though in 1 he proved the mining of litecoin wasn&#x27;t even profitable. Simultaneously acknowledging that any state attempts to ban bitcoin in a given jurisdiction won&#x27;t actually be effective at any rate.<p>And 4 basically says &quot;Because I&#x27;m a keynesian&quot;. Well, that&#x27;s nice, go buy freicoins or some other cryptocurrency that supports your pet economic theory, there are likely dozens by now. Nobody else wants to be forced onto an inflationary store of value and will not accept your McBucks? You don&#x27;t say, maybe there&#x27;s something to be learned from that.
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