Bitcoin won't become better because it's endorsed by politicians or governments. Bitcoins exists and works independently of political propagandas, and it has been always like this since the beginning. Probably that is why it has been working so nicely so far, and I hope it still continue working this for a long time yet!
The impact of politicians over Bitcoin, as I see, is the fact they have influence over a lot of people's actions. If they tell people to behave somehow, they immediately follow the orders. Then we could speculate that if politicians ordered people to use Bitcoin, they would adopt it on the same moment, what would have effect over Bitcoin's demand and price positively. The question is, why would they do this? It doesn't seem to benefit them in anyways.