A more likely explanation, however, is that the NASDAQ crashed because it became clear that dominant market positions in high tech_based businesses were not sources of profits unless accompanied by substantial barriers to entry for new potential competitors--and that such barriers to entry were becoming remarkably hard to create.
Pour conserver leurs sources de profit, les sociétés qui occupaient les positions dominantes sur le marché des nouvelles technologies devaient dresser des barrières plus ou moins infranchissables contre l'apparition de nouveaux concurrents sur le marché. Or ces barrières sont devenues extrêmement difficiles à mettre en place.