Nah.
Firstly, you no longer can buy coins and awards. Three days ago they posted this:

Starting today, you will no longer be able to purchase new coins, but all awards and existing coins will continue to be available until September 12, 2023.

So currently they can not make any quick bugs with coins and awards as they no longer are buy-able.
Additionally, since all coins/awards expire on that date, there is zero reason to get more. Right now you want to get rid of what you have, not stock up just so Reddit can delete your inventory of coins.

This would be different if they announced some beneficial exchange rate for real money or their new system or kept coins you own available indefinitely (or at least way longer), which indeed would trigger some people to stock up "just in case I want to award someone later on".

This is a clean cut, meant to renew the system by first tearing down the old one completely, without leaving anything in place, and then introducing something entirely new. I don't necessarily agree with their communication and deadlines but I don't think there is anything foul at work here. They just want a new system and follow their current trend of rushing everything.