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.