Are motorized bicycles worth it?

Yes I did,and I think It's not a great idea.You see,bicycle is not designed to withstand extreme speed.While motorcycles design is made for high speed control.If you want a bicycle,go for the manual one.It's slower but safer and more fun to drive and you get healthier every time you use it,cheaper running cost.Practicality ? Not really.For example in my town,there's no bicycle parking lot,so when you leave your motorized motorcycle,be sure to lock it somewhere.I usually hand it to my friend who owns a shop.You can't just park your vehicle on the sidewalks or something,the police will take it off.So It's not practical.Plus if you use manual bicycle,It's lighter so It's easy to hand it to your friend whe you want to park it inside your friend's shop.