In my opinion, Bitcoin will only be helpful for the economy if it will be regulated. At the moment, Bitcoin can not be considered a medium of exchange because it is not acceptable at most of the World's locations. You need to convert Bitcoin to a local currency for purchasing anything. But, it is easy to hold Bitcoin, and you have complete control over your holdings. Bitcoin transactions are fast and cost-effective. Bitcoin privacy is the key to its success and the main reason why many governments are still not willing to regulate it.