Since the only way to win in sports betting, according to those who claim to be successful is to treat it like investing, I think that idea actually makes sense. So for our fellow sports bettors here, I’d like to throw this question based on your personal understanding:
Who tell you that? It is a big lie. The person only wants you to waste money on gamble and regret, but that may it be the person's intention. Just tell the person to show you with evidence how he did it.
How do you turn sports betting into something like investing?
What mindset or approach do you use to treat it seriously, like you're managing a portfolio?
I do not treat gambling seriously at all. I use small amount of money for it. Using high amount of money for it will only lead to losses.