An investment in crypto and especially Bitcoin is treated as an investment and store of value more than being used in daily transactions.
It is true that Bitcoin and crypto currencies have not caught as much wind with the global audience but that does not make it a weak asset. The adoption rate for crypto currencies has not reached its peak yet so the government hired new agencies make impractical claims in order to serve the governments purpose.
That's normal because we are in the early stage, these smart people who are investing now are seeing the potential of bitcoin to become a mainstream currency in the future, so they position themselves early to own bitcoin now as they believe the demand will increase and the value will grow since bitcoin is limited in value.
I wouldn't consider that we are still in the early stage, bitcoin went for $.1-$1k already, so they have seen what bitcoin can be, a currency and store of value. Those who have been here have evolved as well, from simply experimenting to becoming one of the best asset so far because of its limited supply.
It's pretty different in fiat as bitcoin is a real example of a "supply and demand", and one thing, volatility maybe a hindrance to become a mainstream currency, but I know there's a lot of solution to that including the stable coin, and maybe Libra if they will successfully launch.
Or LN could be solution if we wanted it to became mainstream currency. Although LN is still very slow as far as adoption is concern.