I still consider trading, either Altcoin or trading with bitcoin to USD as best source of bitcoin.  HYIP, RevShare, Cloud Mining,  MLM, looks the same to me, they are all investment. Most of them promises a good ROI and later on turns to scam.

Signature campaigns are a bit difficult now. I can't rely on it to earn more bitcoin.

I better go on with trading, atleast when I lost my money, its my fault.