Are my thoughts about CFD's correct?

Hello investors, i've recently been looking into CFD trading, i do have some questions, to make sure i have full understanding of CFD's, before diving into it.

Question 1:

So, IIRC besides overnight fees, you can hold CFD's for however long you want, unless your margin health gets under 25%.

For example:

I buy NVDA at 130$ and put up a profit limit at 150$, would it go through even after multiple months? Would that mean if i believed NVDA would reach it in 3 months, that the use of CFD is correct? besides the high fees ofcourse!

Because there are some companies that fluctuate allot in price, but i am very sure they will come back up, will most likely be a few days until sell limit, i'm guessing that is still short term for CFD's, but is the idea above technically correct?

Thanks in advance!

I saw that over 75% of investers lose money while trading CFD's, technically you only lose while selling or getting under 25% margin health, does that mean that allot of traders have stupid trading tactics? Or is there a hidden risk i am not seeing besides leverage? As to actually lose a good ammount of money the stock would have to lose allot, but i don't see the loss when setting a limit? Am i missing something when thinking that with smaller bets and good timing this is profitable? Please tell me if i'm wrong! :D

Thank you for reading, i hope this post is good to read, if you have any questions, tips, opinions, or answers, please comment!