It is possible that whoever purchased the old equipment is does not fully understand how Bitcoin magical internet money works, including how to "create" a new Bitcoin address, so after they put in a lot of effort into decrypting the wallet securing the forum's money, they moved the bitcoin to a wallet that was never encrypted (this would also somewhat assume they do not understand how encryption works). Or maybe whoever purchased the equipment also purchased a pice of paper that happened to be an encrypted paper wallet that was kept with the equipment, or maybe whoever purchased the equipment, found an encrypted paper wallet that they were finally able to crack and needed to move to another wallet that was already on the equipment they purchased.

I think there are a lot of possibilities as to why someone who purchased a computer from the estate would transfer the bitcoin to one of paraipan's existing wallets.