I don't think there is anyone out there who doesn't mind losing money no matter how small, before I decided to invest, it was to grow my money, not lose it, also discretionary income isn't money you can afford to lose, it's what's left of your income after all your basic necessities have been taken care of so it's definitely not money you can afford to lose, it's just money you can use at your discretion for whatever you want to use it for, if you are robbed of your discretionary income you will be pained by that loss regardless of how rich you are because the richer you are the higher your discretionary income is, losing it will hurt I don't think any investor want to lose their money.
In my opinion, an investor who knows the essentials and is well-versed in Bitcoin will never decide to invest an amount of money that he cannot afford to lose.
Using the term
money that he cannot afford to lose makes it sound alot like gambling and not investing because gamblers are the ones usually adviced to gamble responsibly and with money they can afford to lose. An investor should never have this mindset
In as much as I understood your point I will also want you to understand that for the very fact that Bitcoin is a volatile asset and we believe it has potential over a long term, it is a reality that it is not 100 percent guarantee therefore, considering our discretionary income as a money we can afford to lose gives us a balance sense of reasoning that we could lose whatever we are putting in even though the chances is very low, considering our discretionary income as money we can afford to lose reduces the chances of getting overly worried away about losses and increase our willingness to invest even more in Bitcoin, no doubt that such statement is mostly used in the gambling section of which Bitcoin is nothing of such but however, we can still relate or tell the difference, Bitcoin is not a quick and get rich scheme and the reason why no one should be gambling with it, but anything about gambling only relate to getting quick money so even if such statement is use in Bitcoin we should be able to know the difference in context and the risk involvement.
I understand your point, so while its not necessarily money can afford to lose, we tend to treat it as suc, like some kind of a mental fortification to prepare ourselves for the worse should it happen, after all no investment is without risk, but as long as you are not expecting your profit as quickly as possible then it can't be considered as trading, even gambling.
You have a misconception about DCA. You should know that DCA is an investment strategy, it does not guarantee or give you the possibility of success in investment. Because DCA is not a strategy to succeed. To be successful in investment, you need to have a long-term plan and make yourself skilled in investment management. DCA can only give you advantages in buying, to be successful you need to be skilled in management. Even if someone fails in the long term or fails to hold on to DCA, then you are still a failed investor. DCA is considered a good investment strategy, not a strategy to succeed.
I relatively agreed with you on a lot of your points, but saying DCA is not a strategy to succeed is not right, every strategy is aimed at success, this is the very reason why people employ these strategies in the first place, sure there are not guarantees in investment and their is always the possibility of failure, but that's exactly why these strategies are them to reduce the chances of failure and to increase the chances of success.
We invest into bitcoin or any other investment with an expectation that we are going to be profitable, even though we know that we are not guaranteed to be profitable. We also have to know that the short term is very hard to predict, and even bad things can end up happening in which our investment is no longer strong, whether we made mistakes or whether something related to the asset ends up having problems to weaken it as an investment.
Naturally, no one puts money in an investment planning to not make profit, making profit is the primary reason for investment and while there are no guarantees for profit, there are strategies we put in place to increase our chances of profit, its also prudent to know that short term investments are at a higher risk of not making profit and as such short term investments should be avoiding, if the plan is to make profit in bitcoin, then long term investment is the way to go.