Another important thing is that the investment is largely risk-free and you should invest the amount that you can afford to lose.
This statement from you is confusing.
Bitcoin is not risk free.
The advise about investing an amount that you "can afford to lose" is advice given to show that the investment (including an investment in bitcoin) could go to zero, so when you invest, you are choosing to invest into bitcoin from extra money that you have, and you are aware that you could lose up to 100% of your investment amount.
Still thinking of what could probably make one's investment in bitcoin to experience 100% loss but let me just see it as an impossible imagination even though no investment is 100% guaranteed but i don't think it is fair enough for someone to invest in bitcoin with the understanding that their investment can turn to zero. What i can just say is that while we are investing in bitcoin, we shouldn't only focus on the positive aspect of it when the price is seemingly increasing in value since there are times when the market will also become bloody so that when we experience such situation it won't cause us some distress.