If someone agreed to pay you 10 btc which is currently valued at around $90k USD to legally change your name to bitcoin, would you? And you're not allowed to change your name back for at least 5 years.
I would probably do it and name my firstborn after bitcoin for 10 btc.
what!
Oh yeah I am getting the affidavit done right away keep my 10 BTC's ready brother!

Off course it is yes mate, who would not do that. Does my name matters as long as I am not famous! Oh yeah wait if I do change my name that way then probably I will be in the news channels and magazines for doing so and there it is I am famous because my name Bitcoin. That sounds cool idea and I think there is nothing that should stop me from doing that. Also it gets even better when you said, you have to keep it for 5 years only. I will take that shot surely if there is contest like that. Lolz.