What do you mean by safe. Maybe you are talking to bitcoin will still alive. Bitcoin is safe even today. Price fluctuates kill most of the bitcoin users but there's a way to keep again on the track.
I think there is no safe thing now. Yes it is getting popular but many are quitting also. Due to bad images done by government and media others quit maybe because they are looked bad also by friends and families. Plus those who was scammed.
Its a simple concept if you have faith in it then you will use it and if you don't have trust you will simply leave it,the future will totally depend on the adoption level.