Thank you for your opinion sir, I posted it because there are no specific rules for posting an old artwork. What we cannot do is steal other's artwork and posted it to the contest. <...>
To my mind, new artworks should be in priority, otherwise the contest will turn into an exhibition of old ideas, without the need to create something fresh.
Also you had raised an interesting question, whether the painting 'Crypto guy' that you posted can be rightfully considered yours.
Despite the fact that you are the author, but after you sold it to TECSHARE, then now it belongs to him practically.
I am local artist here in Philippines and attended several auction and seminars about art. Yes, the painting will be still mine as long as it is existed. The physical painting will be for TECSHARE, he can sell it for any amount and I don't have control for that, but when he is going to sell it, the credits will be in my name. It will be considered mine as long as it is existed, but I will have no rights for any activity that painting will be involved with. That is actually a good question sir
Thank you. 
BTW, I am making a new one for the contest.
I hope this will be finished today.
