The IRS has already ruled on cryptos since 2014, and cryptos are taxed as property. If you own property like real estate or cryptos, and you're taxed on the gain on that property when you transfer or sell it, then that's a positive for the government, not a negative. You will not see the U.S. government put a ban on property ownership.
I'd say that BTC has definitely retained its purchasing power over the years, wouldn't you?
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They probably look at a chart like this and say ‘See! Tulipmania!’ at each correction.