On the other hand, I want to be able to feel risk, to explore and to adventure/challenge.
According to Theory of Knowledge, there will always be uncertainty and therefore room for risk of existence.
What are you theories on this?
I had this exact same paradigm about a year ago. But the thing is, we will not always have this line of thinking. What I mean is, our minds will slowly evolve. We will obtain higher forms of intelligence and consciousness. We will not have the same desires and interests in 100, 100000 or 10000000000 years from now. Right now we are subjects of our biology. Our mind is limited by our chemical make up. Our interests and desires are are objects of pain and pleasure. Not to mention the limitations of our memory, computational and analytical capabilities right now.
I hope one day, once we are able to transform to energy lifeforms, we will be able to engineer "after life" and "reincarnation" so you can live as material form, feel the risk, but upon death, you are simply in the higher plane with the ability to reincarnate, but not forget your memories (you could choose to, but I would rather not 
)
That way we have options, life will be like a good MMORPG! no boredom!
I also had this exact same idea
I always wondered what the end result of the future was. What our destinies would be. I used to think that the end result was that we would evolve to the level of God (infinite power) where we would create our own individual heavens (personal universes) where we could live forever (with out risk ceasing our existence), living all our fantasies and dreams. However there are two problems with this.
1. There's only a finite amount of things we could do before we end up in a looping cycle. (Not to mention that there might only be a finite amount of space for memory).
2. This line of thinking, like I mentioned before, is based on our current desires.
As we evolve into higher and wiser beings, we will gradually loose our humanity and gain such high forms of intelligence and consciousness that there is no way that we could possibly imagine what our future selves will be like, let alone what their interests would be. This is the beauty of life: venturing into the unknown.
But don't worry. Before we evolve past our need for pleasure, like adventures, games, sex, etc, you will have plenty of time to carry out your fantasies and dreams in the cyberverse (the future internet that will be as realistic as life, like the matrix).
