Virtual currencies are currently a fringe phenomenon in the U.S., accounting for a tiny fraction (less than 0.001%) of all U.S. retail transactions
In the five-year period ending 2016, more than half a billion retail payments were made in Bitcoin or cryptocurrencies that include Bitcoin, Ethereum and Litecoin, according to the most recent estimates.
Virtual currencies' (including Bitcoin) are a way to transfer value, but there is no established mechanism or legal framework in place to protect users.
Virtual currencies could lead to financial services for individuals and corporations that wouldn't be possible otherwise. Bitcoin itself could become the most prominent example of just such a new kind of "money"
I wonder what exact points you are trying to establish?
Unlike many other countries, US at least provides a legal framework for cryptocurrencies so it is expected to grow only! But what you are saying is an estimation, the actual numbers probably are far more different than this estimation. It may be higher or may be lower! I doubt any official data has been released yet to prove your statement.