I think the situation is not so wrong as you decribe it.
You took 7k loss on margin trading, but you paid back all investors which are borrow you for that. So I think I can say that this loss hit your personal funds most. Also you said that you have funds for new a car, but lost this funds.
Recently you reopen this Paxful-trading thing, get PayPal closed, but this is not loss in current time, or very tiny -- it just hits your future profits.
So i think you should have enough money to pay all investors back their money. Also based on Google docs spreadsheet, it is only couple of thousands -- you can earn that in real life job by 3-6 months.
But, first, you need to be transparent .. we can definitelly work this out.
I lost an additional $9k when BTC went from 8k-11k margin trading, which by the way I tried for 2 hours to cancel my margin trade but Kraken just kept saying that my order was failed and to try again until I gave up and went to sleep, waking up to -$8k and eventually -$9k. I strayed away from making any statements about it as I figured I would be able to sustain with the rest of the investor funds doing paxful. Although this was the one time that paypal couldn't have done this as it was the only time I was in a debt. So when I took that $9k hit I struct investor funds. With the first loss happening then the second and now being in dept, then Paypal closing my account, this has been an extremely stressful month, probably one of the worst in my life.
That is indeed very stressful stuff.
However you have promised investors when they signed up that they would be repaid at a certain point in time for a certain amount - i personally think that it would be a bit unfair if you just reduced everyone's repayments.
come up with plans to counter this. You hav eto realise that margin trading is risky as hell, and find plans to basically reduce risk.