Wrong question to ask in this day and age mate. The only way your money stays safe is it if you hide it in a mattress or put it in a sock and hide it in your cupboard. But even if you do, if your govt f*** up then it may lead to inflation or worse hyperinflation leading to an erosion of value in your currency. If your govt doesn’t f*** up and elects a socialist then as the one only original liberal witch of the west - Margaret Thatcher said
Put your savings in the bank—and they’ll nationalize it.
Put your savings in a pension fund or a life assurance company—and a Labour Government would force them to invest the money in their own socialist schemes.
Put your savings in your socks and they’d nationalize socks.
FYI between 2008 and 2016 over 460 banks were shut down
There is no absolute safety of your money. It’s all relative mate.