Absolutely no. USD is the currency of United State of America. Every nation is basing their currencies on this united state dollars. So absolutely this united state dollar is more than have value and more known into this Bitcoin. Bitcoin is not yet officially introduced to other countries while United State Dollar is known to almost all countries all over the world.
Thats crystal clear bitcoins are far better than dollar and many other international currencies. Nothing is wrong in investing as much as you can into bitcoins. Bitcoins have indeed the capability of replacing dollar forever. Dollar at present is nothing as compared to bitcoins. Bitcoins have beaten gold and dollar successfully.
There is hardly any doubt in it that Bitcoin is far better than USD in many ways. The only thing which is still favoring USD in the international market is that it is a legal currency unlike Bitcoin. I believe Bitcoin will be the strongest currency at the day when well hear this news that it is now a legal currency.