Should we adopt this cat?

I think eventually the new cat will calm down. This is all new to him, and a bit scary. To you it seems like aww we have a nice loving home, feed the cat, give him a place off the street.. but to him its like whoa! whats going on, i'm not use to all this. I've had a stray before, and my cat was around 10, they both hated each other for a couple weeks, but now they are best buds. I would just give it some time, and try to be patient.. it should work out fine..~