It certainly will be ETH whenever ETH 2.0 is available. However, even at the time being we are seeing some places like Binance start allowing people to stake in a pool together with the current system. Doesn't mean that it should be done in a different way or should be done badly, it is definitely not a great system currently but it is not zero neither, it is at least something.
Requires you to lock it for a long time and doesn't earn you much, so it is not preferred at the time being. Which leaves things like BNB at bay, that is a lot better and you could stake it in a million different places and you could earn a lot of money from them as well, certainly a good option.
What exactly do you and OP mean by the "safest" coin even?
Are you talking about network safety, or fluctuations with the price of the coin...?
If the former, then you can't get better than Ethereum. ETH2.0 staking has been available for quite a while now and has produced consistent returns. SOL is also a potential alternative, although its network is down sometimes so you will need to be comfortable with that.
If you care about the fiat value of your Stake, then I highly suggest looking at Anchor protocol - not really staking but 20% APY on stablecoins is pretty sweet.