What's with all the scammer posts here? You can do what OP mentions using any service.. Bitcoin doesn't fluctuate enough to really do this even in weeks unless you have big money and buy BTC on a day it goes down $10.00-$30.00..
Please even if you take that as only a insider tip, the goal of the OP was for you to use that exchange. And by just looking at it, we all know that selling BTC for Paypal is a major risk. Look at the site, look at how convenient it is, it's just a huge scam trap, clear as water.
But again you can do it everywhere. My first-read of it I was thinking this is what I do on CEX.io..
Anyone who uses services, with verified ownership or not, that have no record of going at least a year without losses from security while having a decent user-base deserve what's coming to them anyway.. A bit of Darwinist nature is good for crypto-currency..
If you really wanted to criticize anything about the OP you could of pointed out the rarety of a$36.00 jump in BTC price in "2 hours". The average for that change is at least two-weeks. Given today's value of money you'd have to dump tens of thousands to see "real" money profits inside a month..