Surebet I don't know, "Forex HYIP" neither, but Uinvest is a well know ukranian ponzi scheme, LOL!!
Just google "uinvest ponzi" and then let me know
Any evidence that uinvest is a ponzi?
Even if that's the case, that does not prove anything.
99 % of the downloaded files in torrent are illegal stuff (movies, songs, ...).
That does not mean that you can't use that technology to download something you have the right to download.
Most of the HYIP are ponzi. That does not mean that it is not possible to website a HYIP who is actually investing money somewhere...