Unless we're talking about A-grade corporate or government debt. Which isn't guaranteed, of course, but at least its a relatively sensible area to dabble in if you want to play the game.
Anything else, whether "junk bonds" or any of the more "exotic" items listed in this blog post are the sort of thing you should not touch with the proverbial bargepole.
Why ? Because there is a reason those sort of debts are debts...
Remember the 2008 financial crash ? Remember what was a significant part of the cause ?
Yup. That's right.
Initially it was packages of "harmless" mortgage-backed securities and collateralised debt obligations (CDOs).
Then people got greedy and started re-packaging sub-prime loans.
And the rest, as we know, is history.
So, unless you are genuinely, honestly and absolutely certain that you are willing to loose the money you have "invested", which, let's be honest, the majority of people cannot afford to loose the money ... just steer well clear.