There are many moments in life when it is NOT advisable to bet.
Do NOT bet:
If a betting tip doesn’t feel right.
If YOU don’t feel alright.
If you are intoxicated, have a hangover, a headache, etc.
If you don’t have any money to lose.
If you are under pressure to make money.
If you are upset.
If your focus is elsewhere.
If you have a reasonable explanation for why you think your prediction will occur. (A hint: “I had a hunch” does not count as a “reasonable explanation”. Nor does “I had a dream last night about Messi scoring 2 goals in the first half”.)
If you can afford to lose your stake without getting in trouble, having sleepless nights, or harming your friends and family.
If you want to have fun.