We are living at a time that is what the world, including the UK, has always been like. It is just that we have had a century of exceptional domestic peace.
Despite 4 break-ins, none now for over 25 years. I have never been afraid inside my house or outside and DH in his working days travelled a lot. All the break-ins were opportunist and, as the police said to us, the burglar, if you had disturbed him would have been more afraid of you than you would be of him.
if you have valuables that are known about and will attract theft; expensive jewellry (think footballer's partners) or works of art, or are known to keep seriously large sums of money in the house, then that is different and you will need serious security.
But we cannot live our lives in a country as peaceful as the uk is - and it is - is a state of fear about something that is unlikely to happen. You could be living in Gaza, the Congo, Somalia or some of the many teaming cities of the developing world.