So a guy breaks into a home and terrorizes two people, and the only consequences mentioned are six months of unpaid work and a suspended sentence? Great to be a thug in Scotland I guess.
He was the guy who tipped them about the victim owning Bitcoin, the prosecutors seem to have made a deal on him ratting out the assailants.
I don't know what country do you live but in most European countries there is no problem getting a "sport" gun license and additionally "European Firearms Pass" that allows you to travel with your gun in the European Union.
Not all countries allow to EDC, I happen to live in a country where it's legal to carry and to use what ever means necessary (including firearm) to protect yourself.
The EFP won't do any good for protection, you can only have competition guns which are useless, or hunting guns for small game, so the ammunition is one problem and the gun the other, a hunting rifle as self-defense in a fast attack when you're; taken by surprise is useless.
Safe diversification is very important in this kind of scenarios. If one has more than one safe where they keep their Bitcoin holdings, even in situations were you are attacked, the robbers can not have any clues you saved your assets in multiple wallets and you might just show them the least wallet savings and they go away with that one alone thinking its all they have taken.
What stopped the robber from hitting you with a hammer over your fingers every time you say you don't have any more Bitcoins in some other wallet, he has nothing to lose but a few minutes while if you keep denying you will end without a hand, how long do you think you will be able to hide your second stash and not utter a single word about it in such conditions?