Spectre is very interesting and on my radar, but its highly speculative, imo. It doesn't have the technical mix within the team that makes me feel their vision can be built in a self sustaining way.
I am a HUGE Populous fan, but you want to keep a close eye on it. That market is huge and unless he can scale rapidly. Keep in mind the industry he is in is full of sharks and they will sit, wait, and let someone else make the market. Once someone else has done it they will swoop in and try to take it over. Populous is at a big disadvantage in terms of branding and relationships that the big players will have. I personally don't want that to happen, but its a cut throat industry. If they manage to find a way to go after market segments in parts of the world where they don't currently exist they will have a better chance to survive.

Though if they make it through all of that their biggest challenge will be data points. After about 12 to 18 months we will start seeing more crypto focused on collecting more data or allowing users to monetize more data. When that happens, technical know how combined with some solid math skills will win out.
Basically, Spectre is general observe for me and Populous is an invest, but keep a close eye on everything around it.