You're right. It does apply just as much today as it did four years ago, but the buy-in hurts a lot more.

The lesson is to not interpret my beliefs as some abstract, god's-eye-view observation with no real-world consequences. Instead of answering the question "should I buy some Bitcoin?", I answered the question "is Bitcoin the flawless transcendental currency that its proponents claim it to be?" and let that guide my decision on whether to buy Bitcoin.

I obviously have this irrational in-hindsight regret of not whimsically buying a massive pile of Bitcoin in 2010, then selling them in early 2014 and rolling around in a big pile of cash, but I didn't have any good reason to do that. A more pertinent regret about my past actions is that I had a good reason to buy dirt-cheap Bitcoin when they were dirt-cheap by my own material standards, rather than simply dirt-cheap by the standards of history. I didn't act on that good reason and I should have. Even if the currency crashes into oblivion tomorrow, I'll maintain I should have.