I'll take my chances on a major currency (Euro/USD/GBP) over BTC in terms of volatility any day. You could find out that your BTC savings have become nearly worthless in six months. Or if you are unlucky enough to have a debt in BTC you could find out your debt has skyrocketed because of more BTC speculation (imagine you had a 1000BTC loan back when it was $10 a coin).