I don't know why people try to pull these scams because they never work. It doesn't matter if you are using dollars, euros or bitcoins, the crooks always get busted.
The SEC alleges that Shavers promised investors up to 7 percent weekly interest based on BTCST’s Bitcoin market arbitrage activity, which supposedly included selling to individuals who wished to buy Bitcoin "off the radar" in quick fashion or large quantities. In reality, BTCST was a sham and a Ponzi scheme in which Shavers used Bitcoin from new investors to make purported interest payments and cover investor withdrawals on outstanding BTCST investments.