no one can predict bitcoin, so no one knows when it will happen. you only need faith and trust. and the time to answer them all. for now yes it is better to keep collect bitcoin.
Faith and trust alone won't help you. It will just think you for a one direction when you are saving bitcoin for future. Yes you must have this traits but also include proper investment strategy to cover all the cons while you are in the journey of saving the bitcoin for future.
You know even chances of bitcoin to dissappear really have low chances still take a look and give action for the save coins if ever the tides don't went the way you want
I don't think bitcoin will disappear that easily it is growing now and it will continue to grow in future and its always good to save btc for future, as we will see different bitcoin in future.
Yes, we should also save BTC as long term investment