PUBLIC SERVICE ANNOUNCEMENT:
If you ever want to make the coins you have stashed more valuable, what you need to do is this:
When you earn your coins (let's say 5,000,000) save 1 million in a wallet. Sell 4 million to make money. Then spend the money from 2 million of those coins, to buy 1 million coins at 2x the price. Now your coins are more valuable
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Incase anyone missed this
That doesnt really work. It will work for the very short term, but to sustain a higher value people have to continually buy at the higher price. Then there is a problem with scarcity. Devcoin is not scarce, nor is it hard to obtain. Then, on top of all of it, to support a higher price, everyone that is selling any tangible goods for Devcoins would also need to raise the price, and this is very important...hold the higher price through the downward adjustment of price (in between inflated purchase costs on exchanges that you suggest)
In doing so, the sellers have to have a vested interest in higher Devcoin prices. Unless they are heavily invested in it there is no incentive for them to hold out higher prices for tangible goods while the price goes back down (immediately after the inflated buys on exchanges). ANd that needs to be 100% of the people holding out. If one or two say "Why am I overcharging for products on Devcoins?" and decides to adjust, will kill the whole idea. If Devcoins are kept artificially high, it will only give tremendous incentive for everyone else to use other coins. After all, they will get more for their money.
So, even if we got 99% of the Devcoin community to buy back Devcoins at an inflated/manufactured higher cost. It would most likely trigger a flight from Devcoin. If the scheme was even partially successful, people would lose faith and trust in the coin. Now, a coin that is 1) not scarce, 2) not in demand, 3) artificially overpriced, 4) and now has less buying power, would, if the plan succeeds, collapse the coin.
Matter of fact, this is the best possible way to kill a coin. Unfortunately, when it comes to economics, the most two most important laws are:
1) The law of unintended consequences
2) Murphy's Law
PS-I like Devcoin. I think it has a cool structure and I like the idea that it is starting to settle in as the default payment method for web contributions. But the best bet is to let everything happen naturally. The best thing for Devcoin is to let it take the role of being the internet's "content contribution currency". That will do more for the price than any type of price engineering could ever possibly do.