When you stake on pools like Rocketpool your ETHs are swapped for rETH. In the case the pool has a problem and people need to swap their ETH back, it will depend on the pool’s liquidity to fulfill all the orders. If there are not enough ETH (and there won’t be enough for that specific moment) to satisfy the demand, the rETH will be worth less than a used pamper.

It will depend on how much Ether you own.

32 = go to Allnodes. Less than that = consider Rocketpool.

In any case you’ll need a minimum of knowledge of what your doing to avoid making mistakes.