This week, two speculative plays deserve attention -- not because they're safe, but because their risk-reward profiles have shifted dramatically. AST SpaceMobile (ASTS -0.87%) and Rigetti Computing (RGTI -7.42%) are attacking trillion-dollar problems with revolutionary solutions, and recent developments suggest the market might be underestimating their potential. The anti-Starlink play While SpaceX dominates headlines with Starlink, AST SpaceMobile is building something potentially more disruptive: satellit ...