In the long term though no one will be uses currency exchanges to buy and sell BTC, it will just be traders and miners.
The fact that people still used MtGox for the
years they showed serious problems and then the
weeks they had largely or completely halted withdrawals shows that human greed can overwhelm almost any amount of caution.
People will be quick to forget; hopefully not so quick that real advances won't be made that benefit us all.