the 90's companies maybe, but the companies on bitcoin are bitpay, coinbase, Mt.Gox (already doomed), etc.

however TCP/IP, HTTP, FTP, etc are all still around. Those are the protocols.

Bitcoin (the protocol) will most likely survive in any scenario, while bitcoin (the currency) will gain value as Bitcoin gains more utility and becomes more easy to use for the average person.

The difference between the internet and bitcoin is that you can invest directly in the protocol, without having to invest in a company. Never in history was there a chance to directly invest into a potentially life-changing worldwide protocol.