Yes, most of the international transaction takes place in USD even at this moment and bitcoin is not a buzzing currency for the businesses yet. There are multiple reasons behind it and I think the main reason is volatility in the price and growth in the transaction fees. If we could somehow control these two aspects then many businesses would definitely use bitcoin for their financial needs which indirectly boost the global economy.
The fact shall remain that this is not even a currency that can compete to a legal currency like USD, it's just a payment system which will help us bridge for faster transaction, take a look more on the estimated number of users than the price, it's volatile so it's not strong enough.