There is no double your bitcoin opportunity here.
There is no double your bitcoin opportunity here.
Actually, Karl is legit as far as I'm aware. Known him over a year under many different accounts (he likes to get banned a lot) and he's always paid back his investors in the past. Not sure about the recent months though.
Even if he pays his investors back it doesn't mean that he's not running a ponzi.
This is true, though he runs a network of sites and gets advertising revenue from them (with at least "quality" traffic). I won't vouch for this opportunity itself, but Karl has given me no reason to doubt him in the past. That said, it's obviously still risky, and I personally never invested with him.