I believe that we’re only getting started, but there’s still a long journey of highs and lows ahead of us. If you’re interested in investing in this space, I recommend you do the following:
1. Never invest (trade with) money you can’t afford to comfortably lose.
Honestly, I never understood that point. For example, I can't afford to "comfortably lose" anything. Any loss is a pain in the ass, only a smaller one if the loss is not that big. If anything, losing and feeling pain is the only way for you to actually learn something and avoid losing again in the future. If you lose and feel nothing (let alone being comfortable with it), it means that you don't care. But if you don't care, you won't learn anything from your loss. As I come to think, it is more about being comfortable with the risk/reward ratio of your investment, but in no case you should feel "comfortable" with a loss since a loss is a loss. There's nothing good in it as it shows you failed somewhere. On the other hand, genuinely accepting your mistakes is likely the only way to improve.