Altcoins as a commodity may not be a very good idea. Like the Gold Standards of yore, the more valuable an item becomes, the more likely people will desire to hoard the item rather than spend it.
This is essentially why governments went off the precious metal standards. What costs 2 BTC now will cost 1 BTC tomorrow and so on because no one will be willing to spend such a valuable item.
Altcoins as a currency, on the other hand, are a wonderfully innovative idea! However, to be a currency, a unit of exchange needs to be exchanged.
Thus my question: What characteristics would the "Perfect" Altcoin have?
In my humble opinion, the Perfect Altcoin would.....
1. Have a reasonable minting/mining timeframe, say, between 5 to 15 minutes per block,
2. Adjust Difficulty every block,
3. Have Transaction Confirmations around 30 to 150 blocks,
4. Have Proof-of-Work, Proof-of-Stake, and maybe something we could call Proof-of-Use (no idea how this would work, but maybe something like a % cash back type thingy),
5. Built-in Deflationary measures, like Proof-of-Stake would be of limited duration before Demurrage set in (http://en.wikipedia.org/wiki/Demurrage_(currency)), somewhere around 30 to 90 days,
6. Be Sha256 based (although when Scrypt ASICs reach the open market (http://alpha-t.net/blogs/news/8982747-development-update-13-10-2013), this will be moot),
7. Have a way to force a refund from Businesses via a regulated, disinterested third-party,
8. Have perhaps a way to earn interest by loaning the altcoin to others,
9. Be so easy to use in day-to-day transactions that little, old, technophobic grandmothers never have to ask twice about it.
These are just a few ideas and, of course, are in no way to be considered an exhaustive list of ideas, which is why I posit the Question.
Also, I posted this question in the Economics section because the Question is more about how to create a cryptocoin that encourages economic stimulation rather than commodity holding.
What are your ideas?