This is the future of the world now and we became a part of it. There may be setbacks but there will always be the good old Bitcoin that will be left and those who trusted in it will feel how blessed they are for standing beside it and just keeping their coins.
About Lessons. I do believe we must try to filter it out more on whatever we will trust. Try to also listen to the speculations and predictions of other people/traders/investors and not just the advertisements using the popular names in the world. FTX is a good example of that. I am glad I never became a part of it. Those who have experienced Mt.Gox may have known about what is coming and they may also be the ones who avoided this regretful event.
Nothing that is great in this world has come without any cost. We had thousands and thousands of years of human lives, and mostly the last 5 thousand years is recorded somewhat, not perfectly but give or take, and the last thousand years is a bit better recorded.
Look at all the good things that happened and tell me one that just fall on anyone's lap, almost all the things that is good in this world came after hard work and pain, and that means bitcoin will have hard periods here and there, but it will end up being the best currency in the world. It is already the best currency to me, but not to many parts of the world, and they will agree to that when the time comes.