There's no such thing as a good one. You just need to get in at the start and get your money out before it's too late. That's the only tactic you need.
It's purely guess work as to when they'll implode. If you're lucky, you'll be able to get some info that tells you it's all collapsing.
Getting in at the start does not mean anything. A bad site can scam you after day one. I've joined a number of sites in the second or third cycle and made out like a bandit
All the sites are scams though. My point was that if you get in at the start you've got more chance of getting out before it folds. The later you get in the closer you're going to be to the collapse point and the less chance you have of getting out with your money and some profit.
It's pure chance/luck. There's no skill without inside info of some sort.
People will always make money from these schemes as sure as others will lose. It's just very difficult to consistently make money without being the one running a scheme.
As I've said before, if anyone puts in money they can't afford to lose then they're a fool. Only ever put in what you're prepared to lose.
I can agree that you need a little bit of inside info to help you out. But that takes time to get connected in the industry with people who work for admins and share info. I still play the hyip's, I did once buy a car just off hyip winnings and I've been able to more than triple the amount of bitcoin I started with when I first started using bitcoin for hyip's.