Well, i suggest you, most of the sites are scam, But not every site, and if you want to invest your bitcoins into any cloud mining site than only search about it and may be your friends are doing it than you take help from them, and if you get trust-able mining site than in the start invest your litter amount.
Yes agree, we can say 2016 is the best year cloud mining scam, according to the data of approximately 50.000 btc lost stolen cloud mining scam like hashocean, topmine, and many more. Never invest again to cloud mining. stop cloud mining now and forever.