You can fulfill your dreams but it has to be cyclical. Your pizza restaurant dream will come true but you will have to accept fiat money and send that money out of the country from where you will receive bitcoin again.
You can also store bitcoins in other ways, such as collecting bitcoins with a fiat portion of profits and holding them for a long time. Then your dream will come true and since Bitcoin is illegal in your country then you go ahead to fulfill your dream. And don't stop working, keep going. And keep accepting bitcoins like this with honest courage.
That would be kinda costly for the OP if you think about it. Running a business has plenty of processes and let alone having a pizza business to be specific. Being able to hodl Bitcoin would be the last thing that you could possibly worry about considering that there would be plenty of stuffs to talk about such as auditing. There might be questionable stuffs when you start to accept crypto so suddenly unless you're just into small businesses which is another discussion.
@OP I would not risk getting myself behind the bars if I were you. Good thing that your ISPs hasn't banned every crypto sites including this forum though so at least you got that.