You know if its ever made illegal.
How would making it illegal to buy or sell bitcoins prevent it from happening? That approach hasn't worked too well with buying or selling drugs.
Not even a smart comparison. Drugs are addictive. No one has a
need for Bitcoins. Add to that, as long as fiat is easier and more practical to use, it will always dominate because people are lazy and will use what is most convenient. Bitcoins are anything but convenient and easy to use.
Yes, drugs are addictive, but if making them illegal made them go away, one wouldn't be able to use them in the first place to become addicted.
The world actually has an enormous need for something like Bitcoin. Especially for those individuals that choose to live below their means and want to protect their savings from bankers and politicians.
"Enormous need"? Maybe. Certainly one opinion but to go back to your original point, it's better said, that making drugs illegal did not make the
addiction go away. One who's addicted, will do anything to get it. The law is irrelevant and that's what we've seen. There will never be such addiction to Bitcoin, thus making them illegal would pretty much end Bitcoin, with the exception of minor black market uses, because there are other forms of currency that people could readily use. Why risk jail time when there are legal alternatives, that at present, are easier to use?
To answer the OP question: I'd sell them off as fast as I could, to the highest bidder.