Bitfactory is scam, Ore-mine is down ?
Now my best income is my foucet with 500 Satoshi every 5 minutes. ( see referral link )
Is there any reputable side where can i invest my BTC ?
No. There is no place to "invest" your crypto. Any place offering "investment" is either a scam or at best, an honest gambling site. But in no case should you consider it a safe investment. There is very high risk in every aspect of crypto.