That day I did the math and almost got myself so angry I blew a gasket.

Initially, I spent 5 bitcoins to land a supercar, when BTC was around 105,000 USD. Looking at it today, was that decision really expensive? I calculated—recently, the dealer's quote was still 2.2 million, but now the offer has been cut directly to 1.7 million. In other words, if I sell now, I would be losing about 1.8 million directly.

What's even more heartbreaking is this comparison:

If I hadn't sold those 5 BTC back then and just kept them untouched, the current drawdown would only be about 15%. But the key point is, everyone can see Bitcoin's long-term trend—105,000 USD might just be a starting point. And this car? It depreciates every year, and each maintenance session burns money.

Honestly, last year I was still mocking my neighbor's investment mindset, and now I’ve become the biggest joke myself. To clear my head, I’ve decided that from now on, I’ll ride a bicycle whenever I go out—it's environmentally friendly and constantly reminds me what opportunity cost really means.