Is 900 dollars a good amount of money?

Everything is relevant.
In your case, $900 probably represents more than 6 months savings so I would say, yes, it is a good amount of money.

Pffft- I'm worth $925

Saving $900 is a good accomplishment. I suggest you set that aside in case of emergency. An emergency of your own, not a friend's emergency. Because some people who don't save, themselves, will want to take advantage if those that do.

Where do you live? In 1956?

You must live in a ghetto or with your parents. Let me put it this way. I had $7,000 when I moved out and $3000 went to furniture, deposits, the electric, phone and cable companies. I was making $96,000/yr as a STRIPPER so I made more back lol.

1. You pay 200 dollars rent? Where the heck do you live?
2. You should eat more. Otherwise you'll be malnourished and that is very bad.
3. 900 Dollars is pretty much nothing if you are living in America.

No. Invest it after you get another couple of grand up. Try some stock speculation. Make your money work for you, not the other way around.

just keep saving and quit telling people you have it

you can buy a mansion in South Alabama for that price.

Yeah its more than I make in like 3 months.