What your friend is doing is highly irresponsible and could affect him psychologically if the betting did not go his way. The chance of winning betting is lower than the chance of losing it, so it's difficult for me to apprehend what your friend is doing unless he has a cheating code that is really working. If not, his action amounts to living in the future when he has not gotten there.

It is wise to plan with what we have, not what we expect, and to answer your question, I don't do that, and I will not be fooling myself on an invisible money.