from trading minor fluctuations between different exchanges eg mtgox - coinbase - btc-e.
ive done it and now im rich if you follow what i did with my system i will show u for free wotch
buy when 400 on coinbase and sell when 401 on bitstomp do that with lots of money and u make 7 grand a week
great idea! But I believe, person who is reach can pay for his education to write words without making mistakes.
And a bit of advice for the future: money love silence.
This is actually a bad idea. If you had to pay .15% trading fee then you would lose $0.05 per bitcoin that you trade when capturing a dollar spread. This assuming trading fee is much less then what most exchanges will charge you.