Well bitcoin goes down as well isnt just up ,soo sure bitcoin is a good investment but altcoins are allowing a fast cash if play on the right moment at them.
Well being a big or small ammount i would advise poloniex were you can get a fee daily just lending your coins,and peole cant withdraw any ammount before repay,and to apply they need to put some kind of colateral,soo even being a slow interest your bitcoins would be growing.
Just Wow! You posted in the same thread twice and that too almost one after other! The reason why I hate YoBit Sig spammers!
Edit : One more post in the same thread .
Always search for something normal offers like 3-5% revenues montly if you ever think invest at hyip,doubler,shares script be sure the most if not all will scam you with your investment roi or not they will because its soo easy .Go to poloniex invest at lending always people getting loans and paying the small fees.