You are right bro. On the road of PAKISTAN, 100km/h is even more than enough;)
Still we have developed the fantasy of achieving the maximum speed but i clearly think that speed is not the limit for ultimate bikers. If speed is a only concern then buy a used 70cc bike spend 40K on it and it will beat CG,GS,Piaggio,Yamaha etc.Every company offers a unique stuff for which bikers go for it like:
CG125: Excellent Pick, Quality, Good Topspeed, Years of trust
GS150: Long tour and long life bike, Comfortable Bike
Yamaha: Good Quality and pick with years of trust
Piaggio: Innovative design, comfortable and grippy bike
Now its upto us what we want.. Every bike has pros and cons