I have a feeling we can never be sure of any of platform exchange. Did you hear what has happened with polish one? Abucoins? For me the best and most reliable choice would be
https://coindeal.com/ . It`s still a new exchange platform but I see the future in this project
You just bumped out this old topic just to endorsed this new exchange. Please do check first because bumping old threads isnt allowed into this place.
Using btc to invest in websites that generate you roi isn't a good idea. People refer to those sites as HYIP's, mostly all of them are scams, so be careful.
Anything offer that is too good to be true will always have the tendecy to be a scam site.Nothing on this online world would give out easy profits or income into its investors. Always keep an eye and stay away with these kind of sites if you dont like to lose up money. There are lots of choices though when it comes to potential income, might not be big but sustainable for longer runs like trading.