I would not hesitate for a moment to answer that I would be completely satisfied with only 10% per year, which is far better than anything that any bank or investing in government bonds can offer me. Honestly, for me it's not just about the profit (although I won't say it's unimportant), but that I liked being my own bank.
Of course, there is obviously a big difference between those who have, say, 0.10 BTC and 1 BTC, because those who have much more will mostly be satisfied with 10%, others of course will not be nearly satisfied.
well the downside of 10% is 2x every 7 years is better if you are 20 than if you are 70.
but if you can put 300k into it at the age of 70 you get 30k a year income.