Answer:
I am a protector. I sit on a bridge. One person can see right through me while others wonder what I hide.
I am very afraid of doing scary activities.
I have no wallet but I pay my way. I travel the world but in a corner I stay. What am I?
My first is second in line; I send shivers up your spine; not quite shining bright I glitter in the light.
I am one small little piece of paper yet sometimes hold lots of value. I am all you need to get in to big events but will cost you. I am an important part of travel. And if lost you're not coming.
A little house full of meat, no door to go in and eat.