Even then I will ask to the communities or the polygon investor will think that it will be good idea to hold polygon for long-term or the best will be sell immediately after the recovery?
Matic all-time high is $2.92
The price now after the gain that you posted about is $0.517
Anyone that invested on the coin during its all-time high is losing 5.647 divided of the money the person invested on the coin. Example is someone that invested $1000 on Matic at all-time high. The person's money would be $177.05 by now . That means the person is losing $823 already.
So is it worth investing on the coin in long term when it has no chance to even get to its all-time high?
To be fair, every coin has ATH, and that's rarely not in the past. Would you say that none of them would go back to ath? Because i've seen some insane recoveries, and 464.8% needed for Polygon new ATH is nothing compared to them.
And polygon has lots of good fundamentals and big companies backing it. My favorite is of them definitely that reddit has adopted nfts as avatars and they are only using matic (or should i say pol already?
Only time will tell, but it sure is a great factor that contributes to the whole - my bags are going from me to another direction -

It shouldn't discourage you from believing in the project, of course.
One of the nfts, for example, was sold for 105 ETH on Reddit

But it was when they only came out.