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?
You can make quick transactions on many exchanges like poloniex. Exchanges like Coinbase however are not set up for quick transactions.
Exactly, that's why I disagree with the OP because you can actually benefit for a few hours and not necessarily that everyone cannot benefit, some can actually profit quickly from the exchanges.
You people mean how quickly we will be executing our sell orders ? That is the requirement only when prices falling down immediately after hitting a big peak prices. But not just due to exchnages, usually we cannot sell at exact peak prices. I also disagree with OP because we can benefit from big pumps given that there will be enough time for that peak prices to sustain.
When a pump is falling down suddenly then obviously no one can get benefits out of it. When a pump involves more than $200 gaps, we can be sure to get some benefit from that.