When I was really new to bitcoins I bought a bit of it using paypal (nearly 0.023BTC) At that time I found out about this "Bitcoin Forum" and saw a post named "Ponzi.io" (https://bitcointalk.org/index.php?topic=447831.0) I was really late in investing (it was march something 2015) and I didn't know anything about Ponzi scheming and how some people actually scam here (although ponzi.io didn't actually scam). However, I was dumb enough not to check the thread replies and the website Ponzi.io so I just invested 0.015BTC, later on I lost the email (forgot the username and found no way to recover) that was used in my BlockChain account and the same happened with my Wallet Identifier after my laptop stopped working (showed blue screen of death whenever I tried opening it).
So in conclusion I never invested bitcoins again and never actually found out if ponzi.io gave me a profit or no.