Can i port forward to my entire subnet ?

i have this netgear router, and it can give fixed IP adresses through DHCP, but it won’t, so now i still have to change the forwarded port

so now i wonder, can’t i just tell it to offer the package to my entire subnet ? i know it could cause a lag, but with only 2 machines and a barely used port i’m not worried

why i don’t use fixed ip’s ? my machine is a laptop, i’m not gonna switch stuff because of a faulty router

p.s. i already tried forwarding it to the router, but that doesn’t work, neither will an asteriks, any suggestions ? thanks