As noted above, the sales by Mashinsky may have amounted to insider trading
I don't see how they could be anything else. He not only used insider knowledge of when CEL would pump, but he owned and operated the company which was actively pumping CEL using depositors' coins.
I understand that Celsius gave incentives for their deposit holders to receive interest on their deposits in the form of CEL tokens versus the type of coin they had on deposit. I would think that Celsius would purchase CEL tokens on the open market in order to have sufficient CEL tokens to be able to credit their customers' accounts. So Celsius had a legitimate business reason to be buying CEL tokens (this is true even if the practice of paying interest in CEL is non-optimal). I can only speculate as to why Celsius was buying up all that CEL as described in the declaration referenced in an above post, however I think it is likely that Celsius' customers tried various means to try to get money out of their accounts around when Celsius halted withdrawals.
I would also note that, according to the sources I cited in an above post, that Mashinsky made many purchases and sales of CEL over many months. In public companies, it is possible for some employees/executives with access to insider information to have written trading plans to buy or sell stock in their company at specific amounts and intervals that are made ahead of the actual trades. It is possible that Mashinsky employed a similar strategy in his trading of CEL tokens. It is also possible that Mashinsky was comingling his CEL holdings with that of Celsius, which although would create a whole separate set of issues, but would not amount to insider trading.
As someone who may consider investing in a company similar to Celsius, the CEL token concept is something that would turn me off, and I think is a generally bad idea.
I am of the same opinion of any coin/token a centralized platform releases. CEL, BNB, FTX Token, KuCoin Token, etc. They all offer incentives like lower trading fees on that platform or more interest if you hold x amount, but the underlying purpose is singular - encourage users to leave their money in the hands of third parties. They should not be trusted.
Holding coin on a centralized exchange carries risks, and the person/entity considering to do this should be sure they are being compensated for these risks before deciding to hold their coin on an centralized platform. A trader who frequently trades on a centraized exchange might be compensated by their ability to ~instantly trade when they need their trade executed in fractions of a second. In the case of Celsius, the compensation was interest payments (even if in this specific case, deposit-holders are going to see net losses once the bankruptcy case is resolved), and in the case of CEL, the compensation is additional interest.
My issue with CEL tokens is that I understand it has no real utility. I suspect that Celsius purchased CEL on the open market, and their deposit holders would receive the CEL as interest, and presumably would sell the CEL they received. The price of CEL might increase if some deposit holders haven't (yet) received enough CEL to make it worth transferring to an exchange to sell it for a stablecoin or BTC, or if some deposit holders haven't sold the CEL for some other reason. Also, interest payments are made in batches, so Celsius would need to purchase CEL over time, which would likely cause the price to increase, and at the time interest is due to be paid, would transfer the CEL to their customers at the then-current market price.
It is normal for a company in Chapter 11 bankruptcy to continue paying employees. Celsius has filed for Chapter 11 bankruptcy, which means they are continuing operations. Companies in Chapter 11 bankruptcy will continue to pay employees for wages incurred after the bankruptcy filing.
The filing referenced in the article you cited can be found
here. I don't see any reference to the proceeds being used to pay employee salaries or to fund its ongoing operational expenses. From what I can tell, Celsius is asking to convert its stablecoin holdings into fiat currency. This is something that will marginally the reduce the risk to Celsius' customers, as it will remove the risk that any of the stablecoins they are holding will implode.