I think that after a few years it will be worthless money, I think it will continue to develop and develop, because now there will come a new crypto era
I see two very contrasting statements in your post if I understand it correctly. About the advancement you are talking about, of course in the ext few years, Bitcoin would have spread more than today we can speculate.
Also the number of users would have increased as thereby rising the market demand and hence market value. This prospect of development might pose severe threat to the international currency like dollar because it would be much convenient to use Bitcoin for the dealings.
In my opinion after several years the price of bitcoin will be more than $50000, and those who hold their coins for long time and do not sell their holding in time of need for money will be richest persons of their communities in the future. it needs patience and courage to hold coins for such long time. as we saw the earlier investors made thousands of dollar from their holdings.