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In general, it is better if the value of your money that you want to use to buy things does not fluctuate every minute like in the case of Bitcoin.

People are working on Dapps for insurance, lending, prediction markets. It is not practical to take out a loan that is denominated in a volatile currency. Also, If you want to bet on the next president in 2020 for example, it is not practical to make the bet using a volatile currency such as Bitcoin.

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What about using the USD? And using insurance/lending/prediction markets that use the USD?

USD can't be sent over the wire without the approval of and fees paid to banking institutions, with which both parties must be previously related and approved by.

USD is not the ideal currency in terms of value stability. I know nothing about Dai, but if it works, its technology could be expanded to other, more material, more reliable assets than USD, and that would be great.

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