I've been in incel/protoincel forums (off and on) for more than double that length of time, so it's not unreasonable to assume I will be doing such in 5 years.
That said I don't see myself ever being as invested into this forum/subculture as I once was. These days incel communities are dominated by guys half my age who barely ever tried and as an old, profoundly ugly truecel who has approached a lot of women, I can't really relate to them. I've also grown out of my angsty/edgy phase, I can logically understand why no woman would want a guy like me.
So in 5 years I'll probably still be here, but I'll probably average like a few posts a month or something. And I'll still most certainly be a truecel. Unless of course AI really does advance as rapidly as some utopian singularitarians believe in which case I'll have an AI gf. Certainly not likely to happen in 5 years, but at the same time infinitely more likely to happen than getting a "real" girlfriend.