I read your question!
Does this world exist or does it not exist?
Problems similar to Omikan are something that many people have been worried about since ancient times.
Many poets have composed songs on the theme “Is this world a dream or reality (depression)?”
So what's the answer? Speaking of which, both can be said to be correct answers.
Right now, I'm living this reality very hard. If there is today, there will be tomorrow. If you look at it from that side, this world certainly exists.
However, this world is a temporary thing, and if you look at it from the perspective that humans are originally born from nothing and then return to nothing, it can also be said that it is nothing more than a temporary fantasy.
In other words, perceptions only change depending on how you look at it, and the world just exists as it is.
I'm just giving meaning to the world as it is, based on Omikan's subjectivity.
However, even with that being said, we are living in this world, even in our hypothetical form. Omikan-san will have to live the way he is today for a few more decades.
If that's the case, why don't you first try living the reality right in front of you?
Also, wouldn't it be very cool if you could live a way of life without causing obsession with the status, honor, or wealth that you have acquired, saying “after all, such things are just temporary things in this world”?
Please use it as a reference!