The price of a Bitcoin has little to do with how we use its underlying technology called blockchain.
https://charts.bitcoin.com/ - We can see from these charts that the price of bitcoin has been very volatile. Even if the price of bitcoin goes to zero, the technology that powers it won't be affected. The worst case scenario for it would be if someone found a way to control 51% of its blockchain as that would result in them controlling all the aspects of the blockchain and make any changes that they wished to the incorruptible ledgers.