It is true that no one can guarantee Bitcoin in the future and I agree with what you say, we can see historically that Bitcoin adoption will continue to increase and even though some people believe that past events cannot necessarily be repeated, everyone will still accumulate Bitcoin. because this asset has the potential to be able to enjoy profits over a long period of time and because Bitcoin is not regulated by any government, of course this will make someone confident that they will continue to collect it because there is no interest of any group that will exist in Bitcoin so that they move volatility.
I believe that "our" future will be fine with bitcoin, I understand that our grandchildrend's grandchildren may live in a totally different world (one where humanity hopefully solved its issues and not destroyed it) but I am talking about just our lifetime and bitcoin should be fine for retirement for example. Thinking about that part, I believe that we are going to be fine and nothing will be that scary, things should be easy to handle in the end.
We are going to of course have some more issues in the distant future, it is not going to be all that easy to keep bitcoin at the top, but I also believe that we could defend against all the troubles that could come, if only we could stick together and not really have any issues.