If you want, you can invest in obvious Ponzi's, get in early and withdraw right away. In that way, you can just get out before it collapses. For trading, that's a patient man's game and that' how you would learn to foresee what's probably going to happen in the trend.
I will say most of the HYIPs now are early birds and its not good because you will need to refer just for your own bonus on referrals .Hyips are not advisable as a way of investment .Investment is good if you can only manage how you will play your profits when you win . For me Gambling is best than Hyips or Ponzi and Trading is better than Gambling.