I forgotten a site where I've invested only 1mbtc and got 8mbtc. If anyone knows about it please let me know. also similar sites like that will do. Thanks for reading.
To increase your balance 8 times is not so unususal, I've had that experience 10 times at least. If you don't want to risk your money with gambling, which is a right decision btw, you can go to sites with faucets and play there.
PrimeDice for example gives you 10,000 sats during Happy Hours. With the luck you've mentioned you can make it 80,000 sats and from there is not too far from reaching 100,000 sats which can withdraw. Good luck!