bitcoin may not be losing popularity, but it's definitely losing value.
Besides of it's losing value. Bitcoin will not loose it's popularity globally because this is still the king of all crytocurrencies. Some other people who are not yet joining bitcoin are wanting to joined because this will rise soon in the near future. Don't mind the dropping of it's value that's normal in bitcoin world but the popularity will never vanished due to it's user keeps in increasing day by day.