I had bitcoin stolen by a hacker 1 month ago, I have since set up a stronger PW and 2FA. Also gonna accumulate BTC on a paper wallet. Is it safe to reuse the hacked account to trade? If not, what are the options?
That would depend on how your account got hacked in the first place.
If he
1. bruteforced your account password, then yes, it should probably be fine.
2. used a database (
https://leakedsource.ru/) for example, to find out the password of your email / exchange, you should probably still be wary.
3. used social engineering ( although i'm not too sure this is possible with most exchanges), it wouldn't really be safe to use the same account again, as i'd say that the chances of it happening again are pretty big.
I myself would've probably created a new account with a clean email, but you'll need to make your own decision.
If he wants to be sure then he should format his computer and install a Linux distro, something easy if he is a windows user like Ubuntu, just to be safe from proprietary software hacks, if you do that you are avoiding all potential windows exploits.
Of course after that you must be using newly created emails, password and a new account too. This way you will be able to have a peace of mind that if you were under control you are no longer hacked. And don't forget to change your passwords every 6 months at least.