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the US dollar has fallen more than 300 times over the last 100 years due to the appearance of more and more money.
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This statement is false; the USD has fallen in value due to the nonstop printing of new paper money to "buy" certain assets that can hopefully 'save' the government's already ill-stricken state. Bitcoin defeats that in terms of being a deflationary currency and the hard limit of 21 million would be the one followed after the last mBTC is mined. No bullshits, no gimmicks, no scams, just plainly following the protocol.
At the same time, control over their release had only one structure, so that the investments and savings of millions of people could and can depreciate at any time. In fact, this statement works for every classical currency and payment system.
Uhh, what? Are you referring to the miners being responsible on printing new coins? How does these miners affect the investments of millions of people in your point of view? As far as I know, they help process transactions, thus
helping these investments flow around the network.