The development of BTC and its adoption or utility actually have been developing during this time. So far, many broaden the adoption of BTC as payment, not only for trading or investment.
however, the challenges are too many such as:
~ Law and legality in-country
~ Not supported by some countries and banned from them
~ Closed-minded from many people in the worldwide
~ Consider that BTC has been used for crimes
Actually many people have proven that BTC is not what they think. But of course, it needs more process. Moreover, as you said that BTC is not able to see or hold. It is only a digit.