Travel Restrictions: This will begin with restrictions on foreign travel, including suspension/removal of passports. (This has begun in a small way in both the EU and US.) Later, travel restrictions will be extended within the boundaries of countries (highway checkpoints, etc.)
Confiscation of wealth: The EU has instituted the confiscation of bank accounts, which can be expected to become an international form of governmental theft. This does not automatically mean that other assets, such as precious metals and real estate will also be confiscated, but it does mean that the barrier for confiscation has been eliminated. There is therefore no reason to assume that any asset is safe from any government that approves theft through bail-ins.
Food Shortages: The food industry operates on very small profit margins and survives only as a result of quick payment of invoices. With dramatic inflation, marginal businesses (suppliers, wholesalers, and retailers) will fall by the wayside. The percentage of failing businesses will be dependent upon the duration and severity of the inflationary trend.
Squatters Rebellions: A dramatic increase in the number of home and business foreclosures will result in homelessness for anyone whose debt exceeds his ability to pay—even those who presently appear to be well-off. As numbers rise significantly, a new homeless class will be created amongst the former middle class. As they become more numerous, large scale ownership of property may give way to large scale “possession” of property.
Riots: These will likely happen spontaneously due to the above conditions, but if not, governments will create them to justify their desire for greater control of the masses.
Martial Law: The US has already prepared for this, with the passing of the 2012 National Defense Authorization Act (NDAA), which many interpret as declaring the US to be a “battlefield.” The NDAA allows the suspension of habeas corpus, indefinite detention, and the assumption that any resident may be considered an enemy combatant. Similar legislation may be expected in other countries that perceive martial law as a solution to civil unrest.
The above list is purposely brief—a sampling of eventualities that, should they occur, will almost definitely come unannounced. As the decline unfolds, they will surely happen with greater frequency.