Millionaires are created every decade:

2000s - Internet
People building websites while others feared technology thrived.
2010s - Crypto
The "crazy internet money" turned nobodies into billionaires.
2020s - AI
A shrewd person with AI now beats entire organizations' work.
2030s - Attention
The scarcest skill will be maintaining focus in a distracted world.
2040s - Longevity
The wealthy will spend to slow aging while others self-destruct.
2050s - Energy & Water
Men who master primary resources will govern nations.
2060s - Genetics
Humans will start enhancing humans. Because apparently being naturally insecure won't be enough.
2070s - Virtual Reality
People will spend more time escaping life than living it.
2080s - Earth
Civilization will rediscover the oldest trick in history: owning land.
2090s - Peace & Privacy
Silence will become a luxury only the rich can afford.
Each decade rewards individuals who see the future early while the masses call them dreamers.