There is much more needed than riots and a stock market correction to get fiat to become worthless. Everything is priced against the USD, so I sincerely hope that we're going to see that currency survive for as long as possible, at least till Bitcoin becomes more mature, is mass ready, and earns the safe haven asset status that Gold currently enjoys.

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Coming back to the Bitcoin doesn't produce anything part of the article, that is simply not true. If you look back, dividends in form of fork coins have generously rewarded Bitcoin holders, plus we have LN coming up where you can provide liquidity to the network in return for small fees. Especially the latter will stimulate people to lock up their coins in channel funding rather than speculate with it on the market. Massive plus.