Comment by zamadatix

Sustained fusion is already a thing in the universe but while we can't undiscover what powers the sun we could certainly give up replicating it on Earth if we'd like. That would be less an estimate of how long it'd take and more a measure of what we want to invest our limited resources in though.

I think everyone would agree we should find ways of investing that aren't scams. The hard part is who agrees on what is a scam. I don't mind more purely private investment myself though, which has seemed to be a trend in recent years.