In moments like these, one wonders what Fabio Panetta, a member of the European Central Bank's executive board, would be thinking.
In recent years Mr Panetta has delivered a series of speeches about cryptocurrencies.
He's not a fan.
Last year, he delivered a speech in Switzerland with the title: "Paradise lost? How crypto failed to deliver on its promises and what to do about it."
These were some of the points he made, quoted verbatim:
"Crypto has relied on constantly creating new narratives to attract new investors, revealing incompatible views of what crypto-assets are or ought to be.
"Crypto valuations are highly volatile, reflecting the absence of any intrinsic value. This makes them particularly sensitive to changes in risk appetite and market narratives.
"Due to their limitations, cryptos have not developed into a form of finance that is innovative and robust, but have instead morphed into one that is deleterious. The crypto ecosystem is riddled with market failures and negative externalities, and it is bound to experience further market disruptions unless proper regulatory safeguards are put in place.
"Unbacked cryptos lack intrinsic value and have no backing reserves or price stabilisation mechanisms. This makes them inherently highly volatile and unsuitable as a means of payment. Bitcoin, for instance, exhibits volatility levels up to four times higher than stocks, or gold.
"Such high volatility also means that households cannot rely on crypto-assets as a store of value to smooth their consumption over time. Similarly, firms cannot rely on crypto-assets as a unit of account for the calculation of prices or for their balance sheet.
"The very instability of unbacked cryptos does make them appealing as a means of gambling.
"Besides gambling, crypto assets are also being used for bypassing capital controls, sanctions and traditional financial regulation. A prime example is bitcoin, which is used to circumvent taxes and regulations, in particular to evade restrictions on international capital flows and foreign exchange transactions, including on remittances."
In July this year, he spoke at the Italian Banking Association's annual dinner, and he repeated some of those arguments in a condensed form:
"Crypto-assets are held by operators whose main objective is to sell them on at a higher price and, in some cases, to dodge tax rules or the regulations in place to counter money laundering and terrorist financing.
"In many cases, these crypto-assets are in effect akin to a gamble, a speculative high risk contract, whose value is not tied to fundamentals. For these reasons, their value fluctuates very sharply.
"Clearly, they do not possess the characteristics that make them suited to perform the three inherent functions of money: a means of payment, store of value and unit of account."
When Mr Panetta delivered that speech in Switzerland last year, the price of Bitcoin was sitting around US$30,000 (having fallen from its then-peak of almost US$70,000 in late 2021).
When he delivered his speech in July this year, the price of Bitcoin was sitting around $US65,000.
And now, five months later, the price of Bitcoin has cracked US$100,000 for the first time, after an almighty surge in value since Donald Trump's election win.
Here's a chart of Bitcoin's price stretching back more than seven years.