yes, if we manage to be the first crypto currency, that is available for masses, we will mostly be the biggest in the long run. Also with giving 80% of the basic income to steem power holders up to an max from for example 1000 steem dollar worth of steem power, we would give lot of incentive to power up.
Economically it is also self balancing, the less the value of the steem, the more steem power you need to get your full part of the basic income which therefore increase steem price again.
Im also thinking about an proposal that would give incentives when you buy something with steem or steem dollars. For example lets take 10% of the steem inflation and give it to sellers voted by the steem power holders. The sellers are then required to either pay it back with interest, or reduce the prices if somebody buys with steem / steem dollar. This proposal would even be easier to realize, because verifying sellers is much easier then verifying identities.