I have roughly 300k in my fidelity 401k and some one told me we can get 50% of our investments and all the interest payments goes to your account too its hard to believe. Tc: 280k
Pros - you mentioned it in the post, cons- if you loose your job, or quit the whole amount is due immediately, you might loose on some compounding but 5-8 % interest paid to self should help
You will not have to pay all the loan if you change job. That is a misconception. They will ask for your bank account they can deduct monthly due amount from.
Another potential drawback is you can't contribute to 401k (no employer match either) until you pay off the loan. Check your specific 401k plan to see if it applies to you
There's a max of 50k loan amount unless you have very specific circumstances
Can we take this for car loan ?
^ This. - Max 50k/50%, whichever is smaller - general purpose loan (anything you want, car, mortgage, whatever, almost instant approval) allows up to 5 years to pay back - mortgage only, allows up to 10 years, but you have to go through a bunch of paperwork