However, security or trust issues the decentralization of digital currency and the absence of insurance provided by governmental authorities may prevent digital currency from being used as a store of value. Instead, digital currency may be used as a medium of exchange dominantly.
Do you agree with this research result?
Not at all. The majority of people I know that use bitcoins don't spend them ever or rarely spend them. I don't have anywhere local that accepts bitcoins and I don't trust online stores that accept them, so it's almost exclusively a store of value for me.
It totally depends on the region you are living in to. In Europe & America there are lots of places where you can spend the bitcoin. Even it has started in Japan. There are the websites who accepts the Bitcoin and you can buy anything from there. I do agree that it is a store of value for many people and looking at the current situation people are storing it for the reason that its value is going to be increased.