Even a currency as large as Ruble can lose majority of its value against USD in a couple of years. Currency exchange rate is a highly guarded secret since the forex interbank market are decentralized and not regulated, I guess there are large whales behind the scene and manipulate the prices. Soros is just one small freelancer, but already enough to cause large damage to small countries
Yes precisely what I'm trying to explain. Ruble need a couple of years to loose it majority of his value against dollar but have you checked the BTC price it can go upto 1000+ and can come back to 100 within a couple of months.
Sure, but there's a huge difference between a couple of years and a couple of months. Non-BTC currency pairs obviously have a degree of volatility. My point is that that volatility tends to decrease as a currency pair becomes more actively traded. I'm not saying that USD/RUB is static - I'm saying that because it is more heavily traded than BTC/USD it is more stable/less volatile than BTC/USD. Two years to go from ~30 rubles to the dollar to ~60 rubles/$ isn't quite the same as two months for BTC to go from USD 166 to USD 300.