Everyone can. But you are right that if it's not part of anyone's priority, they're not going to invest in it.
I've heard a lot say that they want to invest but they can't, that's because they have a different priority and they have obligations to fulfill.
And that's why even if someone tells that they really like to invest in Bitcoin, they can't because there are other important needs they need to pay attention to.
So, investing in Bitcoin becomes last for them and that's why when they see the price goes up, the regret is there very heavily.
Buying and holding Bitcoin doesn't take much time. I think it was Larry Fink who said that if all the rich people wanted to buy one Bitcoin, there wouldn't be enough coins for everyone. But it's clear that not everyone will buy Bitcoin, just like gold or real estate. Everyone finds assets they understand best, or those they consider safer to invest in.
Of course, not everyone will invest in Bitcoin, it is certainly not possible, because not everyone has the same mentality. No matter how good the potential of Bitcoin is, will everyone understand it correctly? Of course not. And since not everyone can accept everything, not everyone will invest in Bitcoin, only those who understand it well, understand its potential, will invest in it. And that is enough, many, many people are constantly getting involved in Bitcoin, because they understand Bitcoin, and that is many. So let everyone not invest, but the amount of people who have understood it so far, and will understand it in the future, will lead to a Bitcoin crisis in the future, then there will be investors but there will not be enough coins to sell, so its price will automatically skyrocket.