My exchange allows me to trade Bitcoin x5 in USD or Euro's. This chart shows the relationship between BTCEUR divided by BTCUSD to account for the moves in the fiat. My take is that I'm better of longing BTC in Euros for now. The Dollar index is reversing a year long downtrend that may force foreign currency holders to pile into USD to protect their wealth.
In the Aughts the Dollar Index went to 120 and in the 80s it was as high as 130.
The Euro has show some strength against the Dollar, as the Volatility Stop flipped a couple of times in the last year, but that's damning with faint praise.
There is also a possibility that when BTC decides to S the bed it will do so more violently in USD, making the Euro denomination easier to trade.
