Upgrade Ideas for My Current Rig Pentium G4560, B250 MOBO

[Supreme-frost]

Hey Guys, so i built my computer in April 2016

I got a Pentium G4560(dual core with Hyper treading) , R9 280X (Upgraded to RX 470 2020), B250 Mobo, 8gb ram , 120 Gb SSD and 1.5 TB Hard Drive.

I'm tempted to get an i5 7500 for about £70, or i could get an i7 7700 for about £135 ( so double the price, but is it double the performance?

 

Also I've not been following Pc hardware for a few years since i built my rig, i don't know what a nice upgrade will be for my GPU, not sure what new GPUs are out there.

 

All my games I've been playing have ran alright, so dead by daylight, total war Warhammer 2, a few story based games but older titles I guess, LA noir, Tomb raider. Call of Duty Warzone runs terribly probably because of the CPU limitations. If I'm looking to play newer titles like resident evil village etc, will the i5 7500 be a nice upgrade or should i get an i7 7700 for double the price.

 

Most importantly, i,ve recently started Mining Crypto currencies on both GPU and CPU. My 4gb card cant mine Ethereum sadly as i recently found out. New GPU Prices are pretty high right now. Maybe its time to let go of My R9 280 X but im not sure where i can sell it tbh. 

 

Im open to your suggestions Guys, Lemme know what You think :)