Sorry, but I don't think you can possibly put it any better than that - LOL!Quote from Don Bright:
"Why not ask for the biggest toilet to flush your money down" ....lol
Just a joke....
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Don

IMHO, leverage could be OK as "insurance" against margin calls etc, not to mention ElectricSavant's point about being more secured against losing your full account if your broker goes broke (no pun intended).
I'd say for those instances, it would be good to use leverage - I would say if you have most of your money in other, safer places (but reasonably liquid), then you can use that as "equity".
I.e. if your total net worth is $10M, have $1M in your account and trade up to $10M worth on that account (which has 10:1 or higher margin). That way you're only using virtual 10:1 leverage but in reality still using only 100% of your equity.
For those that want to use more than 10:1 - Well I don't know about that. Sorry if I'm offending anyone, but I think using much more than 10:1 is dangerous / reckless / stupid for countless reasons.
I'm trading futures myself, so I'm using enough leverage anyway with 5:1 to 10:1 (absolute minimum $5K per car on ES/NQ). This might make me less money from time to time, but hey - What happens if the market crashes (which will inevitably happen at some time in a trader's career) and you're long? Imagine a limit-lockdown for 200+ points (it's all happened), or a (more frequent) exchange shutdown or spike for that matter?
In those events, I'll be happy not to have used 50:1 or whatever. That's the times in a trader's life when humility all pays off within a few minutes... Live to fight another day, I'd say - And protect your family and whatever you may have.
People who use such tremendous leverage as 20:1 or more (particularly regularly) are basically pikers who're asking for this to happen one day, and not real traders. Fine if you're one of 5,000 traders at MLCO and have a heavy institutional body to back you up (that's why it's called institutional / professional leverage, folks), but not if you're private.
Not to mention people asking for 400:1 leverage or the like. Yous should start practicing and rehearsing "the cup-holder", so you got it down par by the time you gotta do it live in front of the plaza in freezin' down-town NYC. Good Luck, "Aqualung".
Scientist.
P.S: Get better at trading and you won't need so much leverage...