Yes, you are very correct about this sir, most Bitcoin investor don't know that the key to long term investment is good financial management because if you can not be faithful with little, you equally can not be faithful with much, some people thinks that you must be wealthy before you can invest in Bitcoin comfortably, they didn't know that a good financial management is the brain behind every Bitcoin investor that has accumulation not just a good stash of Bitcoin over the years, but have also hold without tempering with it all those while.
Good financial management really makes the investor's path easier to succeed in long-term investment. I even agree with you that good financial management is the key to success in long-term investment. I even want to add investment management to it.
You don't need to be rich to start investing or to be successful in investing. Rather, you need a prudent source of income and good financial management that is built around your position. If you are skilled in financial management and can work according to the plan, then maybe the journey of long-term investment is going to be much easier for you. Then your morale, patience and concentration will take you to the end of success. Even if we don't forget about our investment management, we can say that good financial management and investment management are the keys to success in long-term investment.