He was talking about Ems at the equivalent of .3mm space living 500 years in a month. If you invest when we start seeing a 1 month doubling period and cash out two weeks later, then that's longer than America's been a country. Two months later goes back to before the dark ages, four months is the death of Jesus, and holding on to your investment for a year is basically the entirety of recorded civilization. If you had a time machine and went back and invested in any of those time periods, what are the chances you'd get that money back?
Hanson's analogy about foragers seems more apt. Something along the lines of "there are foragers still today, we didn't kill them off... as long as they're using something we don't care about we're not that bothered by them." Just remember what happens any time native foragers 1) have something we want or 2) try to make a claim against anything we have. It never ends well for the foragers.
Well, you completely ignored the point I made, which is that there is no reason to think emulations would conspire with each other to deny people their investments. Many emulations would also have long periods of investing and money and earning enormous amounts through interest payments. Many non-uploaded humans would probably invest money in funds that would be run (like almost anything else) by uploaded people. Both rich uploads and upload fund managers would have an incentive to oppose confiscations.
...If you had a time machine and went back and invested
Lecture at youtube.
Sorry - haven't watched it yet so no summary, but I expect it to be fun.