I don't think it is ever going to die out. Just like cam models don't age out, despite what some people think. Although I think all of us go through periods of burnout at times, which are just learning experiences on how not to over-extend ourselves in the future. There are quiet spells, there are busy spells, that's how it goes on all of the sites.
I do think that some people are not suited to the business at all, although I'm not saying that is what is going on with you. I'm just talking in general.
Different numbers have been quoted but a lot of cam models drop off in their first year. I don't know enough to quote an exact percentage, but someone here likely will, who has more first-hand knowledge of that.
I am not 100% sure what factors make a new model drop off vs have enough success to be motivated to persevere. I just have wild guesses and opinions on that, based on reading what other models have to say on forums for years. But it's still kind of a mystery to me. A lot of people here say that luck is a factor, which I tend to agree with. I don't think it's 100% luck, but I think that that is one element mixed in with many others.
It takes some models a year or even two or more to make the kind of money they want. So I would imagine patience and faith have something to do with it all too.
But no I don't think the online (or offline for that matter) sex industry will ever die out. I think online sex work will continue to grow, and become bigger and more popular. I've seen more widespread mainstream acceptance over the last few years. If the question were whether every single person (or even most people) who decide (s) to become a cam model (s) will reach their personal financial goals and stay cam modeling long term, then no, I do not think that that will happen. How to tell who will and who won't is a mystery to me, and probably has a lot to do with the way that individual thinks and learns maybe?
