"The average age of the people in a typical startup is right in the 25 to 29 bracket," says Y Combinator co-founder and famed venture capitalist Paul Graham.

What's important here is what we might learn from the relationship the 25 to 29 year-olds have with startup culture, whether or not such static makes you feel old.

Of course, you don't have to walk into the vibrant headquarters of companies like Dropbox, Pinterest, Snapchat, Airbnb, or any of the hundreds of other billion dollar-valued startups just to see exactly how much those in their mid-to-late twenties love them.

Many startup offices are oddly reminiscent of college dorms, with larger-than-life furniture, yoga rooms, ping pong or pool tables, and more.

What makes starting or joining a startup so appealing for the late 20s age bracket isn't necessarily the perks however; it's the freedom they offer.

Because of how startups work--by taking new ideas into a often unexplored and volatile markets--there's a need for workers who aren't tied to any one way of doing or thinking. Startup employees have to be comfortable being uncomfortable.

Older age groups typically (though certainly not in every case) tend to believe what they believe, doing things how they've always been done in-part because that's how they've always been done. "Why change what works?" one might ask.

When you're 25 years-old you don't have the same amount of established processes or habits to hold you back from trying something new or pursuing weird ideas, which makes a startup environment the perfect place to be.

In an essay on his website, Graham elaborates further, giving us insights into how to be an expert in a changing world, much like the 25 to 29 year-olds behind the doors at successful startups.

1. Have an explicit belief in change

Graham writes: "People who fall victim to a monotonically increasing confidence in their opinions are implicitly concluding the world is static. If you consciously remind yourself it isn't, you start to look for change."

The only way to stay in front of the rapidly moving markets of today is to embrace change. As technology continues to evolve and radically up-end the way we live, work, and create, you must be willing to embrace that change or fall behind.

For those in their late twenties, the world has been nothing but  unprecedented rapid change since birth.

2. Don't try to predict it

The problem with trying to predict change is that there are always too many variables at play for you to fully know or see, and what you predict is likely to change itself.

"Instead of trying to point yourself in the right direction, admit you have no idea what the right direction is, and try instead to be super sensitive to the winds of change," Graham explains.

So rather than attempting to predict change, we should set an initial direction to give us momentum but then keep an eye out for any changes that may require us to change course ourselves down the road.

Predicting change is just as harmful as believing it doesn't exist in the first place. For the 25 to 29 year-olds today, the uncertainty of tomorrow is empowering, not frightening or intimidating.

3. Keep your hypotheses just that

If you believe in change and are trying not to predict it, the next logical step is to leave hypotheses and guesses exactly that: as theories.

When we pursue our hypotheses we blind ourselves to anything that might prove us wrong. What proves our hypothesis or way of thinking wrong may actually be exactly what we need to start moving in a better direction.

4. Don't ignore your weird ideas, explore them

"The way to come up with new ideas is not to try explicitly to, but to try to solve problems and simply not discount weird hunches you have in the process," says Graham.

Why shouldn't you ignore weird hunches? Graham explains that after working in a specific field for a year, you know enough about the work to do it well but you're likely still able to get hunches when things feel slightly opportunistic.

Graham explains: "The winds of change originate in the unconscious minds of domain experts... When experts are wrong, it's often because they're experts on an earlier version of the world."

Learn to love your unconscious, weird ideas, not ignore or shun them.

5. Surround yourself with people who have good new ideas

The best way to be an expert in the changing world, much like the 25 to 29 demographic in startup environments? Surround yourself with people who are earnest, energetic, and independently minded, Graham explains.

"Surround yourself with the sort of people new ideas come from. If you want to notice quickly when your beliefs become obsolete, you can't do better than to be friends with the people whose discoveries will make them so."