Volatility is a problem self correcting as the size of Bitcoin market increase and single entities become smaller compared to the whole system.
It is also correcting as the need to convert bitcoins in fiat reduce as more entities accept and use bitcoins to pay and be paid and stay inside the Bitcoin ecosystem.
This would reduce the supply of coin available on exchanges.
I just checked out Purse.io, and I see only Bitcoin's asks for >10% than the Bitstamp price.
This is, all the offer under Bistamp+10%< are gone or filled immediately.