If you're already having huge capital for investment, maybe you can have that mindset losing what you can afford. Same with the friend of mine who quit his job, unfortunately the money he saved didn't prosper and eventually got burned in trading. Without proper knowledge on cryptocurrency trading, everything turned down and got vanished when trading without any concrete foundation of skills.
If someone has very large capital, of course he knows the impact of the investment itself, where he will choose, of course he will choose the long term rather than the short term. Of course he already understands the risks he is taking and can take responsibility himself. It's a shame that your friend actually quit his job. This job can indeed make quite a lot of money if we have the ability to predict or analyze it. However, it takes time or quite a long process to achieve all of that, we cannot or just in an instant or overnight we can achieve all of that.
Understanding it first before starting to invest or trade is of course very important so that they can make the right decisions and can gain profits from what they do and if they force themselves to do something they don't understand well, of course they will lose money. which they use for trading or investing.
If someone chooses to quit their job to invest or trade, of course this will be very risky for them if they experience failure in what they are doing, so it would be better for us to understand this first before deciding to quit our job and choose to be more focused. in investing or trading so that when investing and trading you can get profitable results and I agree with you, the process of being able to make a profit from investing and also trading certainly requires a process so that we can do it well and can make a profit.