Just in case that isn't already setting off your alarm bells, here's the math: 7% interest per week, up to 5000 BTC: http://www.wolframalpha.com/input/?i=1.07

Just in case that isn't already setting off your alarm bells, here's the math: 7% interest per week, up to 5000 BTC: http://www.wolframalpha.com/input/?i=1.07^52 http://www.wolframalpha.com/input/?i=1.07^52 3372.53% per year So if I deposit 148 BTC today, he's promising to pay me 4991.3444 BTC in one year. Note that he only takes referrals, a classic way to drive up demand by limiting availability of the profits. If it sounds too good to be true, it probably is.