just had my most profitable week in trading ever, 4btc profit and still running
i guess all you really need is one big trade

lol what? 4 btc profit is some sort of cause for celebration? LOL you must be new to the squad so I'll spare you the embarrassment
"One big trade" is cool but thats DEFINITELY not all you need.
You need to be able to log on to bittrex and make money on any given day of the week that is what "skill" is all about. I mean whatever, one big trade can put alot of money in your pocket i agreee, but one big loss can take all of that money back and then some
there are loads of guys that will sacrifice waaaay more than 4 btc just to drive the price of a coin down, then they will take a 10 btc position at the bottom and then make 20 btc or more when the price advances, people are making 200 btc or more just by doing this so you have ALOT to learn
stop thinking so small
4 btc is peanuts! If I told you how much money I have made since monday you will know how insignificant 4 btc truly is