The biggest liars of the century are from the politicians around the world , once they get elected they do something else.
Keep in mind politicians are the reflex in the mirror of the citizens from their respective countries. Politicians are to be blamed, but if they are able to have so much influence and reach the power positions they are currently in, you have to blame some other people as well...
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.
We know that Bitcoin cannot be linked to politics. Just because politicians say something about Bitcoin while talking does not mean that Bitcoin will continue on its way or not. Generally Since they like to talk about every subject, it is natural for them to talk about a popular and proven entity.
I don't think Bitcoin investors will invest based on the opinion of a political person. People who invest in Bitcoin are generally people who do their own research and act in a planned manner. Of course, not all investors are the same and there are people who will invest with the guidance of politicians, but the investors I am talking about are real Bitcoin investors.