Hold coins on L2 or bridge back to L1?

I bridged ETH from mainnet over to Arbitrum because I wanted to explore the L2 space and swap for a variety of coins with lower gas fees. Some of those coins I intend to HODL. For example, I swapped for Rocketpool's rETH, which is basically a way of staking ETH for ~4.5% APY. I intend to hold this indefinitely.

Is it worth bridging back to mainnet? Obviously that costs gas, but it reduces the risk associated with holding assets on L2. How do people balance the option of spending gas to get back to L1 vs. assuming increased risk remaining on L2?

Thanks!