The idea of investing no more than you can afford to lose is the same as making sure that you are investing within your discretionary income and not using money that you need for expenses. Also bitcoin is not guaranteed to be successful, so everyone should realize that he could lose up to 100% of what he puts into bitcoin. Surely no one invests into bitcoin (or anything else) or even engages in trading with any intention to lose, yet they still need to account for the possibility that they are not using money that they need for their expenses whether expenses in the coming month or two or even expenses down the road.
That’s true eventually as, the idea of how Bitcoin investments should be approached and I agree on the not having a 100% guarantee on it but, it has some guarantee none the less, especially when compared with the many altcoins out there. Bitcoin has more proven guarantee then the lots of them, deeply rooted in its price history and how it’s carried despite many critic and attacks.
Your sentence is inconsistent whether there is a guarantee or not in this case, I agree more if the sentence is not guaranteed but has a possibility, so in seeing the future in bitcoin.
This means don't risk the money you have entirely in bitcoin, use the money you have arranged to invest in bitcoin, after calculating your living expenses in the next few months and even a year, then after that talk about investing which will be ideal for us, investing in bitcoin is not always profitable, the point is that with fluctuations in the price of bitcoin you will experience a loss phase if your purchase price is higher, well at that time if you have urgent needs and there is no money that you arrange to overcome them, then surely you will force to sell your bitcoin at a loss.
To get a decent profit from bitcoin is to hold it with a long term, therefore it is necessary to have good money management.