Bitcoin and cryptocurrency as whole will still work even withouth the exchanges. Here the vision of cryptocurrency will truly be proven, wherein peer to peer transaction will play a vital role. You wouldnt need exchanger to do your conversion if you wanted to, all you need to do is look for a person who will be willing to exchange your coins with fiat.
Totaly agree. This is the essence of Criptos. Decentralisaction and anonimous.