For those of you who are interested in crypto (and for those of you who aren't but are open-minded), Vitalik has just published this post talking about what in the Ethereum application ecosystem currently excites him. A lot of it is pretty technical, but the 5 overarching categories he talks about are: (1) money, (2) decentralized finance, (3) identity, (4) decentralized autonomous organizations, and (5) hybrid applications.
Money has always been considered the first and most important application of crypto. But there is no shortage of people who will tell you that it'll never work and that fiat currencies backed by a government will always be superior. Today I already think the answer is: it depends. So lately, I have been responding to this comment by asking: Would you rather own the Argentine Peso or would you rather own someting like ETH?
Here's how Vitalik talks about this same point:
When I first visited Argentina in December last year, one of the experiences I remember well was walking around on Christmas Day, when almost everything is closed, looking for a coffee shop. After passing by about five closed ones, we finally found one that was open. When we walked in, the owner recognized me, and immediately showed me that he has ETH and other crypto-assets on his Binance account. We ordered tea and snacks, and we asked if we could pay in ETH. The coffee shop owner obliged, and showed me the QR code for his Binance deposit address, to which I sent about $20 of ETH from my Status wallet on my phone.