Sorry, in my head I somehow read the original post as "where are slots I can put money in to participate in a gold rush", where the actual text is clearly more broad than that.

EDIT: Although most often buying into a technology like this involves buying equity in companies, which is not normally a good way to get in on a high-velocity gold rush -- if you're a normal investor you can't buy into them until they go public, which is normally well-past the true "gold rush" stage. (This is less true if you're an accredited investor but it substitutes different problems.)

Things like bitcoin and domain names, the original examples, don't involve buying equities at all, but were other asset classes entirely, and so didn't have the same issue.