- Hyper loop infrastructure all larger than 1MM population city
- Carbon capture utilization and storage infrastructure 
- Teleportation R&D
- Other CDR methods for net zero GHG
- Space elevator prototype
- Less than $500/kg to get to space
- Private cislunar biz infrastructure 
- bishop ring / orbitals / ring world

from this list my favorite is space elevator prototype — need more specific metrics

Also as we transition from big oil to big shovel (looking for lithium on earth) it’s going to become increasingly important to bring equipment into space and mine - and that’s going to have to be cost effective vs getting stuff out of the ground on earth alone - and to figure out ways to continually be net zero GHG

Searchcaster