Naive Question... but what makes Bitcoin special? Couldn't someone just create the SAME exact thing as Bitcoin but just name it Bytecoin (or any other name)

Sorry if this have been answered and sorry if this is a extremely dumb question, but

what makes Bitcoin special? Couldn't someone create the same exact thing, but name it some other name?

What makes bitcoin consider a 'store of value'? just because it has a finite supply, decentralized, etc?

Just trying to get my head around what would stop someone to just create the same exact thing?

Thanks for your understanding and patience.