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> Filecoin will basically be saying "Filecoins are worth X GB per hour".

The pricing is left fluid precisely to avoid this. The price can change over time. 1 Filecoin / N time today. 0.1 / N tomorrow.

> Using the disk will cost extra electricity and CPU cycles.

Similar to how mining works today, but more useful. Filecoin today still wastes some CPU. But, we've got more surprises coming soon ;)

>The pricing is left fluid precisely to avoid this. The price can change over time. 1 Filecoin / N time today. 0.1 / N tomorrow.

That makes sense from an economic perspective but how does that work from a customer service perspective? Is the price pegged to a different currency? How would a user be able to predict the cost of the service if the price is not pegged to anything?

How can you predict the value of a dollar? It's not pegged to anything either.

Although in fact the decline of the value of the dollar is relatively predictable because of the Federal Reserve's policy goal of keeping inflation relatively low and the law of large numbers as applied to the generation of the real rate of inflation.

At my local deli a dollar used to buy a bagel with the works; and now buys less than half of a plain bagel. That's over the course of 20 years. Any unit of exchange is valued anew in each transaction; the persistence and trends in value exist mostly due to social pressure and the cost of bargaining. I don't make offers and counter offers on each bagel I buy; I just look at the sign and accept the price or leave without a bagel.

> Although in fact the decline of the value of the dollar is relatively predictable because of the Federal Reserve's policy goal of keeping inflation relatively low and the law of large numbers as applied to the generation of the real rate of inflation.

That's a crucial point. If the Fed didn't pledge to keep inflation under control, the dollar wouldn't be such a great store of value or medium of exchange. It's the stability promised by central banks that allow you to "predict the value of a dollar" in the immediate future.

If Filecoin works, the price to store, say, 4 TB of data will be bounded by the cost of a 4 TB disk and the cost of 4 TB of S3. That's a wide range, but it's not as bad as Bitcoin's 1000% fluctuations.

equally imaginary, however

>The problem is that the investment possibilities for Filecoin might be limited since it will be tied to a real world service unlike most other digital currencies.

That certainly hasn't dampened the investment possibilities in actual, government-issued currencies.

> The way to combat this issue is to tie the price to some other currency (e.g. X USD or Bitcoin per GB per hour paid in Filecoin), but it would be tough to convince other people to use your currency if you aren't even confident enough in it to price your own products using it.

You can't peg a decentralized currency. You need to be able to control supply in order for the peg to work (ie. to sell more into the market to lower the price, if needed), and then it wouldn't be decentralized.