1. Vitalik buterin can extend the merge once again in June
2. It's like 2017 all over again, don't lose guard because crypto miners became the real winners when every left mining.
Even if the merge do happen and profit isn't looking good anymore pls care more about the quantities of the coins you mining not their USD value, in such time mining difficulty will be lower, this was how some turned into whales in 2018 and 2019 bear market while others are busy selling their GPUs.
Sell only if your electricity bill is way too high
Terrible advice.
If you are not breaking even on your miners then you shouldn't run them and should sell them. Sunk cost fallacy at its best.
Also, even if you were making a profit (supposing that Buterin is delaying the merge), how much time are you spending on maintaining your miners? And is it worth the little money that you're getting? Probably not.