Well i hope computers and cellphones can be part of the products you willing to sell .

Playing with bitcoin ,trading it with high values would mean they have some fiat to cover the bills needed for atleast 1 year,and well with the profit taked from the trades sure they can get a part and convert into fiat once again.Big ammounts can make several bitcoins with 2-3% margins,soo they can make daily around 50-200 dolllars,meaning around 0,10 to 0,5btc ,soo for them is just soo easy.