Read mtl and loved as well. A pity that ending is meh. But progress of the character is good anyway

He become teacher due to easier reach to students. regarding easy money, it was stated that in that era there was no way to get easy money like stocks, etc. and when he tried to use winning number, it was different. For coding part, he actually studied it if you didnt notice and gave for free, so that people can start training in VR earlier.