Do you have links referencing what you're talking about, please?
Your idea about revitalizing an old coin is not the best, there are plenty of reasons for that.
as far as I can see, you don't have much experience or specific (developer) qualifications. you can hire someone to do it for you, but that is not enough, over time you will need to upgrade, and fix some bugs and there is a big possibility that you won't be able to get to the same developer, but you will have to look for someone new. all this seriously complicates and makes the whole thing more expensive.
Also about a potential scam, are you sure that the previous creator of this coin did not deceive anyone? everyone will associate old problems with that coin, no matter what you start from the beginning. there were no good things because that coin would not be where it is now and it would not need a restart.