Hey there, I would like to invest into bitcoin, any good website to earn good money/btc ?
I see no advantage in cloud mining. The best you can do is buy BTC with low price and sell with high price.
hashnest S5 is still OK to invest
you should try

Hashnest SEEMS to be trusted right now, they may just run away in the future. Hashnest is still quite in the unprofitable range, did you factor in the possible difficulty increase and maintainence fees? When you add these together, it would most probably be not profitable.
I have been using HashNest since they first opened in Sept 2014. They have been great so far and already had a fee reduction once. On top of that... they are backed by one of the only reputable hardware mining manufacturers in the industry Bitmain. If you are going to choose a cloud mining provider, HashNest is currently one of the best out their both for cost per GH to aquire and maintenance to upkeep them. The market exchange platform is nice as well because it provides you an "out" of the investment if you need to.