This is a good time to go out cheap on Luna, yea it has lots of problems presently but buying at 0.77$ and selling at 5$ today is great return, not only that, just because this project has a big issue now doesn't mean its the end, this is not a financial advice but taking risk with just 10$ - 20$ might worth it.
as long as UST has not recovered, it would be very risky to do so. the first one might work, but I doubt there's a second chance. although currently the price of LUNA is starting to fall again, but I'm not sure there will be a pump like before.