RE: to good29 Nov 2022 22:03
Although I am not in the least qualified to provide advice and certainly would not criticise anothers decision, I will caution others with, I hope, a reasoned and broad response.
The most influential economy in the world is US. The largest companies by MCap are in the US and the dollar is the rate against which every commodity is priced. In other words, just because it is dealt in, based in or trades from USA means that it is a bit more important than all the other exchanges in the World. Sure, London is right up there, so is Paris, Frankfurt, Melbourne and Tokyo but as economies go, US then China, India, Europe etc down the pecking order.
FWIW, my portfolio from 1979 until 2008 was entirely UK specific (I knew nothing else and considered nothing beyond UK shores). Around 60% portfolio is US/China based these days and although down a long way this year (-22.x%), recovery when this bear market is over is likely to be greater than if there was a concentration in a single market.
Good fortune to all. 2023 has more turbulence ahead as I foresee OPEC cutting production to deepen recession for UK. Another thought to consider different geographic sector to place investment deposits.