Any computer with an OS supported by wallet.
Personally I use a i5 nuc system.
Staking 12 coins including 3 masternodes on it.
I started with 8gig ram and 128g ssd but found ram is used over 70%.
Staking wallets and masternodes use quite a lot of ram and particularly bitb uses the most rams among wallets I'm running.
So use an i7 with 32g ram and 500g ssd, if you plan to stake many coins and run many local wallets.