How so? As bitcoin is a p2p network, it is likely to be around whatever happens. The only thing that could happen would be that internet breaks down - pretty unlikely, I think. Even when internet breaks in several pieces, each "local internet" will just use their own bitcoin - the block chain will be split in to several. After the two "local internets merge", the blockchain which has more computation behind it, will win.
In discussion, you should separate two things a) bitcoin's economic value/utility b) bitcoin network itself. I'm pretty sure that bitcoin itself will be here about forever, however it is pretty unclear if anyone will use it.