The US and EURO will fight till death. But the policies of global central banks will ultimately make those currencies worthless and new currencies like Bitcoin which has no rulers arbitrarily increasing or lowering the amount of currency will thrive.
I can not wait for the day when currency markets are not managed by the people behind the curtain. With clearer currency rules comes more trade and more prosperity for all. Keep hodling early adopters. Do not get shakin out by this volatility in time volatility will come down to what normal people expect.
"5. The only currencies that won't be debauched by insiders desperate to maintain the illusion that the status quo is permanent are decentralized, distributed non-state currencies that are accessible to everyone with a mobile phone or digital connection." Source: https://www.oftwominds.com/blogmar18/solutions3-18.html
If a newer currency starts to catch on, IE a decentralized one, they may never end up fighting it out as everyone migrates to this new one while they were busy worrying about each other.