Hello,

if somebody's loosing his wallet (e.g. due to disk crash) he's not able to get back his coins, is he?
So every time a person looses coins, they're lost forever? So the bitcoin network will slowly shrink over time? (Because there will always be people who loose wallets!)

TIA
virtualcoin

edit: Forgot to mention the coins of users that are try out bitcoin and then never use it again.