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.
You can invest in satoshidice's bankroll, or you can lend at poloniex there is no risk of default as the user can only enter margin positions with the money, they can't withdraw it, and there position is liquidated and paid back if they drop below a set percentage, the user also doesnt have anything to do with the payback process, the rates there are like .29% daily on btc loans, so I would invest in that, thats what I have been doing but you are still subject to the cryptocurrency price movements.