Each and every day the so called investment sites are appearing offering people incredible profit. So, be careful if it sounds too good to be true, then probably it isn't so stay away from it. Many offers sound tempting but think with your own head. It's better to go for low but secure profit then losing everything.
It so hard to find investment site that guarranted for not to be a scam. I think trading is the best way to invest our bitcoin, no scam and no limitation of profit.