Compared to brokerage fees for stocks and ETFs in Australia, the crypto fees are miniscule. Usually a matter of cents not dollars. ETH fees are criminal, but that's only if you choose to transact on the ETH network. You can hold ETH the coin without paying a cent in ETH gas fees. There's plenty of alternatives and honestly, if you're just looking to buy and hold the basic tokens like BTC, ETH etc on a solid exchange like Binance, there's very little fees to pay.