Thats the thing though, they wont reverse because they *are* linear and predictable

@xenocryptsite and I are the only people on ET old enough to remember when folks thought we were on the blue line in 2015.

One really counter-intuitive thing about random walks is that they will produce very visually compelling long term trends even when they're actually purely random. Here's a fun example I just generated - most folks would think the long linear decline in the middle was real!