Yeah it would definitely crash but as more tech starts to adopt cryptocurrency theyre going to go with the currency with the most amount of following & functionality, as in even if there is a coin that trumps bitcoin in functionality companies would feel a lot safer to adopt an OG coin which has had a steady following for the past decade with proven usability. Not even trying to persuade against altcoin as I have a few ethers but thats my two cents on once cryptocurrency becomes a more household name