What do you think i should do to this website?

[Dankcha08]

Nope, I don't think it's good strategy. Your new domain will be flagged as "duplicated content" domain. So no, I think it's better to avoid this

have you done a 301 redirect in the gsc ? or did you make a new account

 

[jyciap11]

have you done a 301 redirect in the gsc ? or did you make a new account

Nope, 301 redirect and send the new domain as a new website on GSC fresh account