[TheNamesGames]

A human. When he is young, he walks with feet and hands, when he is in the middle age he walks with two legs and when he is old he uses a walking stick.

I am important in the most dangerous times.


You can not see, hear or smell me.

If you use me too much, you will die fatally.

What am i?

Hint: image you are running away from blood-thirsty dinosaurs.