But it would be wrong to say that investing can no longer bring us wealth. The world is constantly developing, many professions and fields are born, in which technology is the top priority field . That means there will be more startups, projects, ideas similar to Apple, Tesla being created...or the crypto market is gradually maturing and will create more breakthroughs . From there, it will certainly create a lot of potential investment opportunities.
It varies to the experience of people that have made investments and they just lost their money on it. They've made wrong investments and if they're telling that investing won't bring us wealth anymore, that's because that's what they think based on how they've made the wrong choices. But we all will agree that investing can make someone wealthy. Aside from the example you've given, there are also employees that are given the stock-option on top of their salary. One perfect example are the NVIDIA employees.
Investing is still an option , a good way to get rich these days.
The proven strategy by most people that are wealthy today. Even the current top wealthies people, majority of their riches came from their investments.