BTC is a big obstacle, because he is decentralized and the government has no way to control BTC.
If you recognize that BTC is a currency that has a great impact on the legal currency issued by your country!
I think at this time no signs of this and bitcoin is the leader with quite a bit. if something replace bitcoin as a choice of the most popular does not mean that will fall price as well. who knows. what we know when it is cryptocurrency the most frequently used and the most popular. in the future, repairs can be done on bitcoin and we can see the coins other take place.