The post highlights that disruptive technologies often initially appear as "toys" or "gambling," dismissed by incumbents, but can become the "next big thing" by riding external forces like cheaper microchips and ubiquitous bandwidth. Investors should look for disruptive technologies that are designed to improve with these external forces, rather than just sustaining technologies, as these are more likely to be the top performers in the long run. This suggests a focus on early-stage, potentially undervalued innovations that are currently underestimated.