Generally everybody have of opinion of bitcoin or cryptocurrency, I guess that's why some people do not care to invest or trade, most people also had once invest and failed probably loss their money. All this makes different opinion of bitcoin to them why it should not stay.
Countries also have view it in different direction of affecting economy and capitalism system, some sees it in a positive direction while others sees it as negative threats to the country's economy.
But most believe the bitcoin to be best when considering many other offers. We see what other can't see in bitcoin, we trust bitcoin to improve standard of living, we keep buying for the project to survive threats. But we never ask what if the whole stuff varnish overnight?
What is your reason why bitcoin should stay in the next 100 years! when the government are worried about it?
Maybe our opinions about bitcoin can give hedge to the government.
Further, of what I just said above, I didn't even enumerate any reasons why I want Bitcoin to stay and I have a few ones that I find the most exciting.
Ignoring (for now) the technical ones, I really want to see Bitcoin to improve people's savings and also protecting their privacy and sovereignty by means of transferring responsibility from the state agents and 3rd parties to the money owner. We need to be in total control of what belongs to us by right (and nature).
This would be an important step to bring the market laws to the nature, I mean, let the market rule the economy by itself, instead of states controlling what they see fit to them, at their own and only will! States should not take part in the economy and financial systems, or take very little part, at most!
And after this, I would also like Bitcoin to stay to be able to confirm all the properties of hard money and tell people that it really works better than state controlled money printed out of thin air!
Technical reasons would be more in the context of mining maybe, like how can mining help in the electrical grid and even in agriculture or heating.
For instance, an idea could be (without thinking much about it) in every new house / apartment should be installed a miner and, that miner would be mining Bitcoin to whoever was living in the house and / or to the owner of the house. That miner should also be prepared to heat the house in the winter, if needed and the electricity price could not be as we have in some countries.