I've never said not to put any money in pyramining.
No one's forcing you to join it. Is it not worth a go? 0.1btc isn't a huge investment to start with. I'm in 1btc initially. It'll be different when the ASIC's start up and the coin rate halves. As i'm a newb and don't have many bitcoins I think it's worth spreading a few around to try and get a steady stream. Isn't that what Bitcoin is about?
Both questions you asked have to be answered by yourself.
And it seems you've already done so.
Everything's cool then, I guess.