This time, I will make it short. Nobody can guarantee you that The Merge will be a smooth transition from ETH POW to ETH POS chain. There might be plenty of issues. So you have the choice: keep your ETH on Ethereum blockchain or layer-2, hoping it will be ok. Or move it to a more secure blockchain.

There are plenty of alternatives to Ethereum, and this time for once I will promote a bit the Avalanche blockchain. A bit long to explain, but it is one of the most decentralized ones, although it is not perfect, and on it you can trade BTC, ETH and some other well-known tokens without taking the risk of seeing them disappear, since it is not linked to Ethereum blockchain or layer-2's.

So, to keep it simple, you can simply transfer your coins to Avalanche. Other possibilities: BNB chain (not my favorite) or Solana (not the one I prefer...).