Do you guys think that this can change in the long term ?
I think bitcoin not failed as a currency because it is good and trusted. Actually bitcoin now is so popular and famous because you can see it all over the world you can see it in the news, advertisement or even in the movie because there is so many people that is rich now because of bitcoin.
can not be used for currency, it's free they say like that, but in fact I can still easily spend bitcoin on some sites easily..
Bitcoin will continue to be a volitile commodity until it finally scales properly and fees go down to a reasonable amount. Until then, hard to say