The main reason this is not necessary (besides the obvious problems it would create), is because a BTCcan be split in billions of pieces. Whereas a dollar/euro can only be split in 100 pieces. When the value of a currency rises to extreme points, you could end up with a car costing several cents. If this is the case then you will not be able to pay for something like bread as this would be far too expensive. That's the reason that banks make sure there is enough money circulating to allow people to buy what they want at the right price. But if a car was .01BTC, that would still allow people to buy bread for, for example, 0.0000001BTC. So there's no real problem in 'losing' coins.