The blockchain database is starting to get really big, though. It's going to become impractical to keep a local wallet on your PC soon.
Eventually, yes. Probably in the next 20 years or so, but I wouldn't call that "soon" (I'm not valve). The blockchain is about 9GB now, after 4 years. Really, it's probably more like 3 years of real usage since the first year bitcoin was still largely unknown and unused, but even if you assume it grows by 4GB per year it will still be awhile before it's too large for an average PC to easily store. And if hard drive capacities continue to increase in the meantime it may be even longer, or never, before it gets to be too large.
On the other hand the blockchain is already too big for most mobile devices, there are clients that use a peer to peer blockchain system and don't need to store the entire chain locally that work as a fine solution for that.
According to some gold is not done growing, mr. smarty pants. This is what is utterly laughable about people like you. You blame the USD for *everything* yet fail to even compensate for the slightest variable outside of your myopic tunnel vision buffoonery. Do you *really* think that the runup in gold is 100% of the USD's issue, or even 80%? Do you even stop to consider gold hoarding, derivative gold, or the input cost to gold? Nope, none of those have affected the volatility of gold, just the USD. What a fool.
Gold isn't used as a currency, and really it's impractical to use it as a currency. It can never reach the potential bitcoin can simply because it's very difficult and expensive to safely spend gold over the internet.
The USD will never be stable? How do you measure "stable". Most rational people measure "stable" by standard deviation. What is the standard deviation of the USD as measured by a basket of goods over the last 10, 20, 30, 40 and 50 years? It is a lot lower than gold! I am sure you would come to a different conclusion, but that would not be one based upon data, but one of your own myopic tunnel vision, as you cannot even fathom regression, multi-variate statistics or actual comprehension and analysis of data. Instead, you want to grasp to your preconceived notions.
As the main currency of the USA, merchants have incentive to keep USD prices fairly stable. When prices increase, customers tend to get irrationally upset at the company that raised such prices, so some companies will keep price stable for a long time, even after USD value has dropped significantly, because it's better to take a small cut in profit rather than raise prices constantly. Another technique many companies use is selling smaller packages at the same price, so they effectively raise price per unit but to a dumb consumer it might just look like the same thing for the same price, not realizing they are getting less.
If you want a real example of the instability of the dollar, take a look at gas prices. They change daily in some places, because the margins and controls on gas don't allow for much variance beyond cost, and cost is largely determined by the variance in value of USD and the gasoline sold.
Beyond all that, USD has some stability due to numbers. I've said over and over that bitcoin will be more stable with greater acceptance. This is because with a 1 billion market-cap any millionaire investor can make a significant difference in the world bitcoin market and upset the value. With a 15 trillion market cap, such as USD currently, a million dollar investor can't even make a noticeable dent in the market. As the real value of bitcoin increases it will become more stable, because singular speculators won't be able to move value around so much.
Yet more foolishness. You don't blame one on another as if they are the only causes, you analyze is one feeding into another? Does a depression cause deflation? What is the trigger point? How was it caused? Did the deflation get set off by the depression which caused a deflationary spiral which was exacerbated by the depression?
The cause of the great depression didn't have shit to do with deflationary spiral.
Here is some helpful information, from a source vastly more reliable than LegendKiller:
http://en.wikipedia.org/wiki/Great_depression
What about all of the other periods of deflationary spirals in just our own country's experience? You ignore those data points also.
Huh? So we had a deflationary spiral while using an inflationary currency, really? I guess that puts the nail in the coffin, you can't blame it on the currency, if we had a "deflationary spiral" with USD.
Yet more failure to acknowledge that the "deflation" seen in technology has nothing to do with monetary deflation. You are not incentivized to "save" merely because you will "make" money by holding onto your currency because that commoditized item will become cheaper, as traditional deflation exists.
What? You absolutely have incentive to save your money. Computers are going to be faster and cheaper tomorrow, why buy today?
Deflationary spiral: stuff will be cheaper tomorrow, so you don't buy it today
Computer industry: computer will be cheaper tomorrow, so don't buy it today
Please explain the difference, as you have utterly failed to do so thus far.
Using computers is absurd because there is always a more expensive computer released, one that is faster, better equipped with a newer OS. Thus, there is no deflation in the computer industry unless you want to talk about reduction in input costs due to offshoring or something like that.
You are bringing up an irrelevant point.
You can use the same argument against deflationary spiral, to argue that they shouldn't exist.
Deflationary spiral: there is always a more expensive "product" being produced, even if it's not the thing you were actually going to buy, so you shouldn't save your money
The existence of faster and more expensive computers in the future doesn't change the basic fact, that all computers are getting cheaper over time and today is NEVER the best day to buy one, you can always wait a day or week or month or year and get a better deal.