The ans is - Money
I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I ?
I have many tongues, and must be fed. Restrain me not, and I will spread. I could save you, or make you dead, it all depends on how I'm fed. Who am I?