Hallo,
first of all a loophole is an exchange witch creates more and more money every time you do it...
Exampel: When Berlin was separated into east and west, people could buy a bottle of beer in east, drink that beer and bring the bottle to westberlin. As exchange for an empty bottle, you recived as much money in west, that you could buy a new bottle of beer in east...
The same is happening in crypto world very often...
The first time i saw this was a difference on poloniex and bittrex in pink...
so if pink has a price of 500 on polo and 400 on bittrex...
you could buy pink on bittrex send it to polo and do your earnings, repeat it by using another currencie
in fact this works, but polo is very fast in blocking that currencies, so be quick...
Another exampel is south korea
South koreas price for Bitcoin was about 1500$ above the avrige i the world...
if you would have gone to korea selling BTC and then moving out with cash to japan (there is a fast connection by fairy) you could rebuy bitcoin and so on....
Everytime leaving korea you could earn10000$
It would have been awesome to work on that fairy for this week the loophole was opened, when i was goin to buy me a ticket the loophole closes...
so keep your eyes open to find the loopholes, they are existing!..
Thank you.