As the title said,
Some of the important Banks in Australia is allowing their customer to purchase cryptocurrency using their Bank account. Because of this, bitcoin can now be easily purchased in Australia.
Reference Link: https://usethebitcoin.com/australian-bank-allow-customers-purchase-cryptocurrencies/

I think this will be the start, hopefully, other banks around the world will follow so we will have a convenient way to buy and selling cryptocurrency to fiat.