Bitcoin is easier to use for me than the dollar.
Very superised to hear that. You can use dollar to buy anything. US dollar is the most used drug money.
Bitcoin is good, but Dollar will win the race as it is widely used and widely accepted, and dollar being more traditional have gained trust from the people, comparatively bitcoin is a new currency, and people hesitate in using bitcoin as they are not aware about it, dollar will face competition from bitcoin, but it will never replace dollar.
In future as mentioned there will be some races going on in which various cryptocurrencies compete with the local currencies which might be a dollar or euro or some other nations, but bitcoin won't replace those currencies place. Only possibility the bitcoin users get increased.