Whenever in doubt, better safe than sorry. Maybe it's legit, maybe not, either way, there is no free lunch out there, and if something looks suspicious, maybe best to treat it like that.
Does anyone know about explicitcoininvestment . com ?
Is this a fraud?
If you have any doubts about scams and frauds regarding crypto, please check the scams & accusations subforum and there you can search and ask for more details. Also, people update that section regularly so if you don't get a desired answer right away, maybe something pops up soon.