If Bitcoin price pumps from $1300 to $3000 in few hours, nobody would make profit from it, because the exchanges wouldn't allow you to sell your Bitcoins and make the fast profit, it would bring a big loss for exchange sites.
Do you agree with this?
I didn't know what will happen, but I think it can be a possibility. I think they will be waiting for hours or maybe days before they can allow someone to sell it. But, if you can't sell it, maybe you can convert it. I am using a coins.ph wallet where we can convert bitcoin into fiat in a second, so I think if they did not allow me to do a cash out, I will be converting that bitcoin into fiat. And after a dump, I will be converting it again to bitcoin.