Well, yeah nobody is putting millions in small coins.
But if you think theres no risk in Bitcoin or ETH, Bitcoin is safer it still dropped to ~ $3500 last crash but ETH was even worse it dropped to $50.
So if you are a professional investor, why in hell would you ever risk millions in ETH when it can turn 1 million into 50k?
There is always risk in investment and you should cash out when you see bear market because those markets take 2-3 years. There are better options, it's pointless if you buy at the top and wait whole bear market while holding coins.
If you do stop-loss you would never turn your million to 50k. It's a standard for every investment, not just for ETH.
Long term traders don't care about daily prices. They already bought coins from dip, when everybody else is hopelessly selling.