a better option is to invest directly, not through others. you can buy bitcoin with fiat. Keep it in your wallet and then wait until you see a profit. because the bitcoin is real and promising, not a scam.
This is the safest and basic way to invest with bitcoin. Bitcoin is not really a Scam but "Might" actually be used for scamming. Its feature really fits to be used for illegal activities. I have also heArd that bitcoin is now already used as networking scheme, and this made me doubt the idea.
Personally, If i would choose to invest, I wont let anyone know and intervene on it. The security and becoming anonymous once I joined them becomes useless.