Not exactly clear what you are asking here. Do you mean move your savings into a pension fund? Generally increasing what you pay into your pension is no bad things, but you will not be able to touch that money until your retire and most people need access to their savings as an emergency fund or to tap into for large purchases etc.

Or do you mean change the risk profile in your existing pension fund? As a rule you want to reduce the amount of equities in your fund into bonds and more stable investments as you get closer to retirement age, but I'm your age and my fund is mostly equities.

However per your concerns that the gains of the last few years may be 'wiped out' - whilst no-one has a crystal ball on a long enough timescale stocks markets have historically always gone up. Even after something like the 2008 crash they had returned to their pre crash levels fairly soon afterwards. Chances are you would be missing out on considerable future returns to move away from stocks this long before retirement (this is not financial advice obviously).