In my opinion it should be a store value currency. Although to make this happen and good for stores it should maintain a steady grow. If the currency doesn't have a steady grow the stores won't pick it up because it's with too much risk.
Next to that I don't think bitcoin should be the only coin. Take litecoin for example, this can work as well. But with introducing cryptocurrencys as a payment method there should be strict guidelines for it. and with strict guidelines the growth would be way less.
So there are pro's and con's ofcourse, but in my opinion it can work!
Good luck with your contest, I'm gonna follow to comments!
Yes growth certainly helps - I'm not sure how steady it can be though, it is still relatively small.
Yeah exactly that. And since it's small the big company's won't take it as a payment because it's still a risk. I do hope cryptocurrency's get into the real world and get accepted as payment!