This ain't good when you are trading huge volumes of money from your pocket man.
In similar ways the WazirX get frozen many times but this is not good for the users. Whenever this happens you don't see the real time prices and your app do not synch up with the real time price from the server and thus you may loose lot of money if at the background the prices has gone up and down crazy.
Binance on the other hand grabbing billions of dollars in fees and they should increase their bandwith crazy high to tackle such problems.
This could be cause for major loss for someone with big trades on the line. It would cost nothing to exchanger since they still get their money no matter what.

I mean, no exchange would NOT ever crash. It'd crash sooner or later, plus, If you could think of increasing their server size to accommodate traffic, why wouldn't they? I'm pretty sure Binance has some extra servers up or something in case of traffic increase, just that it went above more than they expected. No server is absolutely future proof, at the very least, Binance is very active in informing if something happens. Sides, you can also set up stop losses to prevent huge losses in trading, instead of letting it sit there. That's probably the best option you have to avoid getting hit by a market dump/pump.