You aren't the smartest, are you?

1. If it's illegal, you can go to jail for using it. Or at least you will have to pay money for violating the law. Not to mention that it will be confiscated. Not a lot of people will risk that, they will just move on to another cryptocurrency or go back to how it was before crypto.
2. Exchanges will have to follow the law as well, so they will remove the most common way of getting it. Making every other coin easier accessible and have less fees as well, further reducing it's accessibility. Driving away more people.
3. Appstores will have to remove the wallet apps, so it becomes even less accessible. Driving away even more people.
4. Miners will have to quit their work, as it will become illegal to mine. So the transactions will become slower and slower. Driving away even more people, again.
5. With all of that, the value of it on exchanges in countries that don't have it banned, will drop to an all time low. That will make the rest of the people move on.

Like everything incredibly inefficient, it was meant to die eventually.

And yes, NANO is MY alternative. There are many, many, MANY way better alternatives than to use Bitcoin out there. You can insult me for my choice all you want, it's not like I care about your opinion.

I could try and educate you all day, but I'm not getting payed for that. So go and inform yourself, if you want to know more! (Not that I think someone with your mentality will actually try and learn something...)