If something happens with me today or tomorrow, I have a several peoples whom can I trust. They know my passwords, where I keep it and how to access to my funds. Also they know how exchange it to fiat.
Why not instruct your loved ones to use it? Since withdrawing money from the market usually does not take much time and only requires a little knowledge, they can do it. I never trust others so I will never guide them because the risk is too great and if they are greedy, they will definitely take all your assets. In my opinion you should guide your parents right now or make a detailed video tutorial for them to understand.
That is probably a good idea, creating a video they can use to claim your coins seems to be a good option especially if you tell them they should not watch the video until something happens to you, the disadvantage is that this solution will not last long as the technology is always improving and the video formats change so if you record your message now and you do not update it after a few decades it could be possible there will not device available that could play your video.