Alex Zhang says he must be careful about which problems he invests time in because a different solution or a new model might emerge within six months and work much better for a problem.

“yeah i mean to me like also this aspect of like what is worth”

“spending and betting my time on now because like maybe i spent a lot of time on this problem and then like in six months like a different solution kind of like maybe a new model comes out and it's like oh it's way better for this and so i do have to be careful i like you know you have to be conscious about like where you think things might be going um so yeah”