to makes things clear for OP ... ( and for you all who don't know maybe ) ...
How money's are printed ? - simple answer , each country (* except usa !!! ) use their national gold treasures to cover the value of the currency printed by that country ... ( example Bulgaria , east european country , few years back had a huge fallback with their national currency , just because the national bank returned for particular peoples [ part of gold worth ] the gold confiscated when communism come to power there , same happened in romania and all ex-communism countries ) ... So the currency it's actually the value of the gold at the time given held by the national bank of this country ... like a deposit / thesaurus .
USA , in other hand use similar structure of issuing moneys , BUT , the president have one more way to bring '' extra '' money's in their economy , they actually can print money '' per se '' with no actual coverage in gold thesaurus , it's enough an '' loan '' from the congress house , it's actually looking like the congress guarantee for the presidential administration , sometime soon they will actually get that gold to be put into thesaurus . Yes that's only on usa possible ! and that's why usa economy can survive to such '' bubble ''
What happens when the economy bubble will go , it's easy , quite easy to anticipate lol , happened before few times on history , funny thing is from usa started too that situation , see '' Panic of 1837 '' , '' Panic of 1907 ''

... why this happens then and why happens on modern times ? it's easy to understand at the end of the day , american economy it's '' consumer economy '' based , more - it's not an economy created on historical - natural rich economy , like UK , germany , france , spain and others have ... american economy it's based on excessive consume of resources ( natural and financial ones ) ...
In modern times , peoples should be more aware about what they can get by their own , not what they can get on '' credit '' , like when you are buying products and services not with your own money , with moneys what you will eventually get in the future in hope to repay your debts ... And yes , if you heard rummors or you didn't know , current ( last few years of instability of global economy ) have at the origin arab countries , practically leaders of producing natural gas and oil , if you ask how and why they manage to produce such damage is easy , americans keep always for their intern use billions of gallons of liquid fuel for their economy ( they have confirmed reserves ) , but they don't produce enough oil from their soil ! , so they have to import , from where ? easy .. from arab countries ...
already I made a huge post lol I know

....
What will happens when '' bubble '' go ? will be easy to predict , real estate market will grow like used to grow between 1960-2000 , the consume of services and imported products on usa will grow like usual , and everyone MUST pay taxes in order to cover everything ...
Ask yourself some questions , with what money they build cities in desert like Dubai ? and is not only one ... they work on several similar projects what costs maybe hundreds of billions

from where they took that money's ? from desert ? damn it there is not growing even 1 piece of grass lol

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Later edit : yeah ... we aren't in 1920

by any chance did you checked how '' money '' was made before 1920

? ... yep my friend you guess , same way like today , nothing was change in last 2000 years , since the roman empire , and yes they made their curency same like now , well they didn't used to have fancy notes , go to any museum on europe and see , we have historical dates , moneys like coins made from different materials exist since bronze era ....
And few more rows , for everyone curiosity , did you know Japan is only country from the world what know on history a period of negative inflation ? Seriously it's true lol ... actually inflation is defined when money from the economy it's '' not enough '' in short words ... well , just like a curiosity for everyone , Japan knows a period of 2-3 years I think ( if I`m not work I must chk ) ... when they actually had negative inflation

... how they manage to have this ? guess !!!
