compare btc daily volume on ~200 million vs forex 5 Trillion
BTC doesn't even move the needle I would say NO
Volume is not the main thing to be considered here. If this is gonna be the future(which I wish) there must be legal regulations. If some people are gonna use it for money laundering or smuggle the dirty money, thisis gonna be a huge problem even for 200 billions. Forex is totally legal so if it is 97459743 trillion, there is no problem. People are gonna accept this blockchain system but it is gonna take time and after legalisation in the most of the world, it is gonna blow like the banks. Even faster cuz there is no need for a building everywhere.
But come to think off that the main feature on most crypto currencies is decentralized which means it cant really be controlled this is why it wont really be an easy thing for it to be legalized or even regulated because they cant do such thing. I don't know why its being compared to Forex considering that the volume gap would really be huge knowing that Forex is been here for how many centuries for sure because it do involves on trading up local centralized currencies.