Given there is going to be serious economic disruption there is a lot be said for diversifying your assets. If most of your assets are currently in the US moving your pension fund into assets held outside it is a strong de-risking move, particularly if you can move it out of the country totally using a foreign prover provider as well as holding non-US assets(not sure if that last is legally possible, don't know much about your pension system).

Note you may get poorer performance - it's really up in the air just yet what the short term impacts will be economically (depends what King Mango ends up deciding, it's mostly speculation right now)

Edit for typo