for now all types of investments is risky, from cloud mining then HYIP and a Ponzi (everyone would advise to avoid both types of investment).
better we manage our own money
My U2cloudmining system investment is free...absolutly free...think about.
Like all real investments you invest (for free) and if the site make profit you share the profit.
Like all real investments you do not know the future profit (guaranted profit are low or are ponzi sheme)
With my U2cloudmining system you do not know the profit in advance,but you are sure that you can sell your shares for real satoshi...
you claim shares for free and you sell for real satoshi...interesting...not?
Of course if you believe that the profit or future profit is high,you can re-invest your earning...
only your earning so you can never lose from your poket...
Like all real investment in shares...best is to claim before the profit is huge...
once the profit is huge...less shares are to claim...logic as well.
Have fun