I do not recommend these sites, but let us be realistic, why there are tens of HYIP pop up every day? If no one is investing, there won't be new sites or at least the number should decrease. I think this kind of sites has a lot of fans who like easy money and always search for new sites to catch the opportunity, even though early investors might lose their money in some cases.
Because HYIPs is the pastest way to double your in just 10 days. How do you get that kind of interest it is only for HYIPs.
If you have a 1 bitcoin then you hold it for a week, for a month, or for a year with no action, 1 bitcoin is always 1 bitcoin if no action apply.
And if you have 1 bitcoin then you invest with smarter and wiser way, I promise you it will double your bitcoin. Therefore, there is no impossible for that if you always think positive on it with faith.
To the first quote:
I'd say the reason why there are new HYIPs every day is because a lot of people knows how to make one and I'm sure that there are HYIP owners that goes with different company names and have numerous amount of HYIP sites. There's not that much skill involved when creating one since there are people selling website templates for HYIP sites. You can also hire a web designer if you don't want to make it yourself.
Second quote:
I also do believe that you can easily double your money in HYIP if ONLY THEY WOULD PAY. That is the problem there. You create these illusions that your money will grow and grow by investing in HYIP sites and they want you to believe that. But look at the actual situation and ask yourself, how can you double your money when in the first time that you invest your money, your coins are already gone?
TL;DR: HYIP sites give you the illusion of growing your money, thus, making you invest in their website.
Investing in HYIP site and hoping to double your money is like throwing your money into the fire and hoping that the ashes would turn out to be double the amount of money that you've burnt.