Is it possible for an alternative crypt-currency to spread just like the bitcoin did or even get a higher value than btc.
Of course they can. Keep in mind that Bitcoin is almost 5 years old. It takes a lot of time and effort, but anything is possible. If someone could prove to the world (at least those that use Bitcoin) that their coin was far superior, and could work on merchant adoption (someone with a lot of money and contacts could do this), they could surpass it.