Maybe it's not just about selling, but about people increasingly beginning to realize the importance of the fact that it's not smart to store such a valuable asset online, and there are more and more of them who are starting to be their own bank after all.
By a smart move in not storing a valuable asset online which necessitates the selling, I suppose you mean like them moving there coins from exchanges which is a custodial wallet to non custodial wallets like electrum and bitcoin core which makes them totally in control of their crypto affairs otherwise, it won't be such a smart move selling after all.
It's an interesting direction, but I fear that it's only wishful thinking, and since "you can't teach an old mule new tricks", it's not the old traders / users doing this.
I would be happy to be wrong

Nicely said of a Mule not being able to learn or adapt to new tricks but, we can only hope that it doesn't apply in this regard and with new companies coming in and buying huge it could only be an invite for more and more companies to come into the market. So, it would be a wise option to stop selling and hodl for those who can.