The current financial system ain't going anywhere so it has no choice but to co exist. Co existing is the same as parallel anyway innit?
As long as there are governments there'll be fiat and they will pay out in it and demand tax in it. You may be able to step out of parts of the old system but you'd need to live in a properly radical jurisdiction yet to exist to fully shed it.
That is true and since both of them are coexisting right now, there is possibly no way that the Cryptocurrency Industry can mess up with the current financial system because it could always exists since not all people are available to use Cryptocurrencies or some people still lack knowledge on how to use Cryptocurrencies. This would be a huge step if people can gain knowledge about them since it might also be another way to help people to monetize their time.