Nope, it wouldn't take a whole lot to get the numbers to start going down (compared to other currencies).
As much as it pains me to say it, this is the truth.
Now, it does have the
capability to become the strongest, so do take that into account.
I'm thinking that it would be a inevitable for bitcoin to become the strongest currency since compared to gold it has been more accessible to a lot of different investors individual or big companies alike. So I see it would happen anytime in the future and that is if it continues to flourish and get attention worldwide and also when internet is improve greatly with more services and markets that uses bitcoins as it mode of payment.