That's a safe way to go.
I'd split it into two parts, one to reduce the loan and another to invest in some crypto. I would diversify in crypto. But just taking the decision to remain as you are and use the extra income as an investment or loan reduction is the best decision you can make. As I've grown older, I give less and less importance to material things. Health and family (including close friends) are the only things that matter.
Oh yeah, that's sort of what we were thinking, split the additional funds and go I'm two directions. We like the debt reduction thing because interest sucks and a bit of crypto here and there could turn into a lot later down the track. Crypto gains can also go towards debt reduction later too, so a big win. Potentially.