Bitcoin is designed to make mining a zero sum game. Saving/exchanging is more profitable when you use a currency with a lower miner surplus.
That's simply false.
Care to elaborate?
This post elaborates the concept pretty well. Based on what I've read here for the last couple years it looks like a consensus that mining profits tend towards zero and that's a good thing.
If it's not self-evident, the difference between "zero-sum" and "Tend[ing] toward zero" is the difference between making nothing and making something. To make this clearer, repeated an infinite number of times, the first gets you (zero times infinity) equals zero, the second gives you ... you guessed it, no need to write it out -- infinity.
Gold value doesn't depend on existence of miners for its value. No miners -> gold value goes up. No miners -> Bitcoin value crashes.
"No miners" is hyperbolic. Would a single firm would be able to organize itself efficiently enough to eliminate even anonymous illegal foreign competitors? I can understand if you don't already have an exact projection, but what order of magnitude are you seriously suggesting this will reach? 10, 100, 1000 firms?
Either you misunderstood me or vice-versa. I'm not exaggerating, i quite literally mean "no miners." If mining is not profitable, and we discount fetishists who enjoy spending huge sums of money on specialized silicon in hopes of eventually breaking even, we can assume there'll be no miners. Don't you agree?
If there are no gold miners, goody for gold. If there are no Bitcoin miners? No Bitcoin. That's all. Nothing hyperbolic.
Basically I don't think we don't need to be as decentralized as possible, just decentralized "enough" as defined by the consumer market for cryptocurrencies.
That's false in many ways. The most obvious being that the market can't "define" anything. The only way for a market to signal dissatisfaction is through lowered interest (lowered demand -> lowered value). That's simply not eloquent enough -- a huge dump on MtGox crashing Bitcoin prices doesn't scream "decentralize!"
Sure it does! ASIC-related security problems would be a clear reason to dump Bitcoin and buy Litecoin, and you'd see the two prices change relative to one another. Right now LTC/USD closely follows BTC/USD, but that's because ASICs aren't really a problem yet and they're both equally influenced by FinCEN and Cyprus. You'd also see a lot of Bitcoin users pushing for a hash algorithm switch, and the chain would fork - before block X we use the unfairly exploited old SHA256, and afterwards we use scrypt. Mining cartels would obviously support the old chain, but be unable to 51% attack the new one. If you were asleep when it forked you'd own coins in both chains, and then vote with your wallet as to which security model is better.
Wait. You're saying that an exodus of Bitcoin user base to Lightcoin, accompanied by dumps & hard forks, is just the market's way of saying "hey, perhaps some change might be nice"? You're suggesting that what comes out of the wash -- a totally different coin relying on scrypt -- is *still Bitcoin* (or, rather, *two distinctly different Bitcoins*)? And if that fails too, and people go back to paper money, would that too be called "Bitcoin"?
Arguing in the alternative, the forking panic caused by forking will abso-forking-lutely fork the value of Bitcoin. The streets will be littered with paper wallets, and street sweepers will praise their patron saint, Mr. Clean, for virtual currencies not printed on paper. TL;DR: Won't be smooth or pretty.
There are plenty of other coins that are ASIC-resistant if and when this becomes an issue. If you think there's a systemic risk in BTC's security model that is less pronounced in other coins, you might want to convert a portion of your savings.
A frightening argument, that. Along the lines of "when the boat starts sinking, just buy a different boat." (Protip: The best time to sell your Titanic is *before* it hits an iceberg.)
Are you suggesting people shouldn't diversify because accepting the truth that BTC isn't a 100% reliable investment is frightening? Use today's best coin as your means of exchange, and tomorrow's possible coins as your store of wealth. Many brick and mortar merchants already hedge their bitcoins in local fiat currency, so they'd be largely unaffected until they switched to whichever new cryptocurrency their customers want.
If you're arguing that Bitcoin's not 100% reliable as investment, you're arguing with the wrong guy. I'm not even sure if it's a *sound* long-term investment, though that's another topic. I'm simply saying that it's unreasonable to assume that selling will always remain an option. With no security flaws in sight, unloading just a few grand on Gox will send the price plummeting. Now imagine the panic a fundamental security flaw would cause. A real clusterfork.
Finally, i'm just not buying the "many brick & mortar Bitcoin merchants hedging Bitcoin with fiat." My first gripe is with the word "many." If there aren't many B&M Bitcoin merchants, there couldn't be many that hedge their bets.
Digging a bit deeper, these Bitcoin merchants you've mentioned are no more Bitcoin merchants than the carnival hucksters are "ticket merchants." Yeah, a carny huckster accepts tickets for rides & plushy toys, but in the end of the day, he exchanges those tickets for $$$. When he services the rides & pays for gas & electricity, he pays in $$$. Just like your B&M Bitcoin merchant accepts Bitcoin, but when it's time to stock up & pay the bills ... that's right, $$$. Something like that.