haii. can you teach me how about PBmining ? i dont understand
You don't understand what exactly?
You go to pbmining.com (if you like, by clicking on the pbmining link in my signature), you sign up for an account, then you buy hashrate, and every Sunday you get payout.
That's the short and simple, and fully biased version.
Whether or not a ponzi is a poplar discussion. There are those that have invested early and are on profit after month after month after month of receiving payments. And there are those that claim PBMining is a ponzi scheme and spent month after month after month warning others to stay away because it's a sure loss.
I'm not one of the earliest birds, pretty late actually when it comes to pbmining, but I've picked up a few referrals, so all in all I'm getting more out of them then I've put in. Though I'm not afraid to put in more. If they disappear tomorrow I'm in profit, if they disappear three months from now I'm in more profit. But for now I think they won't disappear. Nu guarantees for the future as the mining scene changes, coins change, profitability changes, difficulty changes, and so on and so on. Things can turn to crap pretty damn fast in Crypto.
Also, get yourself familiar with various calculators, like
http://www.coinwarz.com/calculators or my favorite,
http://evolyn.net/bitcoin/mining_calc.php. Check before you spent money on anything. Just keep in mind that the better you udnerstand all varaibles, the better numbers you can enter and the more reliable (if ever) the result of the calcs.
So, investing or not, make up your own mind. And when you invest, don't ever invest anything you can't afford to lose. Period.
Can somebody tell me how long it usually take until i reach roi?I read about 4 or 6 Months
I looked at serveral charts and saw that the difficulty is increasing around 20 percent every month,so i will not get any money after 5 Months...is this correct?
Yes, check the calcutalors I mentioned. Whatever you've read, if it was more then a minute ago then any truth in the message (if it was there in the first place) might no longer apply. Things change. And with crypto there's a always a damn lot that can change. Calculators.. yesterday's calculations are old news today ( <= after me saying you should use those calculators... makes it clear you should never stop thinking about what you're doing, I hope?!)