People never learn because they think that after it has happened, it never happens again or it doesn't repeat itself. They refuse to learn from people's experience. No matter how reputable an exchange seems, like they can never go bankrupt or be victims of hack, people who have not learnt this lesson should learn it never to keep their coins in an exchange when there are cold storages and safer places for them.
I said it the other day, but eventually this won't happen. Since, opening a centralised exchange in the first place will be considered a shady act, since there's no reason why peer to peer can become the mainstream trading route. There's the issue of escrow, and making it simple enough for people to use, and unfortunately I don't think multisig is the answer there due to the complexity that it adds to the transaction.
Ultimately, the only reason we tolerate, and don't learn our lessons about centralised exchanges is that they're by large very convenient due to the simplicity. It's one of the biggest questions you get asked by people who don't know about Bitcoin. "But, how easy is it to buy something with Bitcoin", which of course what they're actually asking is how easy is it to exchange, and turn into
real (from their perspective) money. Centralised exchanges make it incredibly easy to do that within a few minutes.
However, peer to peer exchanges don't have that simplicity or speed. Unless, you've found a trusted seller, but even then you're likely ignoring certain security recommendations during the process. That's where we should be looking to develop, making peer to peer exchanges more convenient, and simple to use.
The only issue I see with peer to peer exchanges is governments not liking the idea of them, due to the fact that people could potentially money launder easily. Since, centralised exchanges will be reporting their books to the authorities, whereas peer to peer isn't doing that, it's down to each user to do that. Which of course, they/you should be doing, but the government will definitely see issue in the potential for people to cheat the system or go undetected more easily there.