When its stable and not going up and down like the weight of an obese diabetic with stomach ulcers, for christs sake. No new companies are going to adopt bitcoins as a payment type if the actual value of them is going to change hour to hour in such huge amounts. I could pay someone 2 btc for a game and by the time the transaction is verified I need to pay him an extra 0.25 because of the price shift and then when that gets verified turns out he owes me 0.5 btc again.
You mean when it never moves up or down and stays at the same price. Did you read the bitcoin paper by any chance? Do you understand that the increasing difficulty and thus value of each block is required so the network cannot be subverted by increasing resources from an adversary but instead relies on natural growth of participants, computing power and networking? Do you understand that the price for bitcoins will go up, and do so naturally by design? And do you understand that difficulty increases by a geometric progression (+25..+40% per round) thus creating a cost that grows exponentially? Do you now understand why a linear trend on a logarithmic chart shows that the system is growing at the predicted rate?
Think about the future. In 10 years, miners will receive less bitcoins per block. They will spend 1000 times more power to find the next block. And even with advances in computing power, the cost of a bitcoin will surely be at least 100 more than it is now.
Do you suppose a bitcoin that costs 200$ to make should be sold for 20$?About your payment issue. It's a stupid example. When you buy (lock in an order) you have to pay exactly the quote, nothing less or more. It's illegal to request a different payment than the one from the invoice, just because your local currency went up or down. It can go up or down, you should add a buffer as a seller. Completely irrelevant to the topic.
It's illegal to do so, correct, but companies aren't going to use bitcoin if they can't reliably turn a profit using it because of the exchange issues.
as for the difficulty rise, do I therefore assume that the correct answer is that a bitcoin mined for 1 dollar should be sold for 200? All that does is screw over late adopters and puts
all of the wealth into the early adopters hands, which is an incredibly selfish ideal to have.