I'm not familiar with this bitconnect investment, but when investing online there is always some risk, and the total amount to be invested should be splitted among different options. No one can assure it's 100% safe, you will find only words here, no guarantees... When investing you are at your own risk.
What I can say is that this site is around since 2013, always paid everyone correctly, support is helpful and active on forum, they claim to have a mining farm that together with their 5% house edge Dice game sustains the site and make it sustainable. Also, the daily/yearly interest doesn't look exaggerated, it's even considered too low for many people here.
But indeed, when investing large amounts, like 1000 BTC as you said, we feel insecure.
Even having only good experiences with FreeBitco.in I wouldn't put so much money on it anyway.
Bitconnect was just coin that offered high returns. 1% a day and up to 40% monthly. Much higher than this of course. It just still blows my mind. Thanks for your kind response. i want to put some in for the interest, just dont wanna wake up one day and this site is gone or something. Exchanges are somewhat "safe", not really, haha, but id have to say id trust them a bit more. however, the fact that the site is around since 2013 is a great thing.