There are good and bad for this it will cause corruption, governments wants to be on top they want to gain power and to get some taxes that why i have the civilization now a days. hope for the next 10 years it would be different.
The danger of corruption will be carried out by proper check and balance on conversions and transactions and this will allow the clean and clear investment, if whole world will start using one currency there will be no economic crisis anywhere in the world and every country will be stable and, bitcoin is solution to the problem and it will be implement in future,