Today I randomly got a dropbox share from someone named Matthew Jones that contained a bitcoin.js file. Anyone know what sort of scam is going on here? the file doesn't show anything clear. Thanks for any help.
I assume you don't know the person since you said 'someone named Matthew Jones'. It's highly likely that the file is a malware that can steal data from your pc so you'll probably be better off not touching the file at all.
If you have opened the file already, well, bad things can happen. Run anti-malware scans and set up/renew securities for all your accounts. Probably even reformat your pc just to be somehow, safe.