I see this Site is working so long and still the users getting their payments ?
But the bad point is users are waiting 4+ Months to double the btc ?
In this long period of time who knows what happens ?
So better the admin should make the time frame to 1+ month only not more than that .. than someone (including me ) can think of joining here.
Otherwise your site/hyip/ponzi cannot attract more users
one month to double btc impossible
DoubleBot.com - The only one place to double your BTC with a 100% guarantee.
Guaranteed much

That's it! DoubleBot is doubling your money as fast as possible.
It is impossible to double money with guarantees too fast. Except of ponzi, of course. Would you like me to turn this site into a Ponzi mode?
I think he meant, for example, instead of being 4 months for 100%, make it 1 month for 25%.