It is very important to have a long-term perspective to invest in Bitcoin, but there are many obstacles that you have to overcome in the long run. I agree with you. If you invest directly without saving for your essential expenses such as food, medical expenses, etc., you may encounter a different reality. Because when you try to avoid these, you may be forced to sell your long-term Bitcoins if you do not have the money when you need it the most. Not only will you be financially damaged, but you may also lose the ability to invest again in the future.
Food is a daily need, for which you do not need to save money, but invest the remaining money after meeting your daily needs and keep it for necessary expenses. Rely on discretionary money for investment, savings or building any fund. If you invest more than your discretionary money or try to save in any fund, you may face big losses.
You need to learn to separate discretionary money, discretionary money is that which is left over after meeting your daily needs and which is unnecessary for you or you will not need it for a long time. Investing with this money will artificially reduce the possibility of financial crisis and will help you to be stable even during market volatility. This stability can be further enhanced when you invest according to your means using the DCA strategy. In addition to investments, keep backup funds ready for emergencies so that you can afford to lose your job or during a major accident or medical expenses and keep the investment fund intact.
Most people don't have that "extra money" that they could invest in bitcoin for the long term. The majority of people around the world are living hand to mouth and they cannot afford to buy bitcoin or a larger portion of it. Even if they save some money, they do not invest in bitcoin because they feel that the amount they will get with that little money will be way less, and therefore they are tempted to buy altcoins.
And we have seen how the altcoin investors are slaughtered in this bull cycle. No matter how much money we have for crypto investment, the majority of it should go into bitcoin investments.