Rasp pi are simply not made for this task.
Cheap used Lenovo tiny PCs do a better job.
Dell has a good small unit. Buy a used one. Many will hold a nvme and a ssd.
I use Mac mini’s 2012 model and or 2014 models.
I clone a backup os with a wallet . And away I go.
I both love and hate RPi units.
To say they are not up to the task is not quite fair, they are up to it but barely.
The 4 (if it was not for the heat issue) is more then up to it.
It's when you are using your RPi as a node & a pi-hole & open VPN front end for your home network all at once you really see problems.
I am actually using the one I got from from the Avalon deal that never happened as a smart controller in the condo.
I have an PowerEdge server running Hyper-V that handles most of my "heavy lifting" but I also have many a RPi sitting around doing stuff too.
The nice thing about them is to play they are cheap and simple.
And, you can power it down from bring your node, swap in a different SD card and now it's back to being your VPN server, power it down again and put in another SD card and it's doing something else.
Do I 100% rely on it. No.
As with everything, YMMV.
-Dave