This reminds me of that harry potter line. When harry "dies" and he is in the train station with dumbledore, he asks if any of this is real or is it in his mind, dumbledore says just because it's in your mind doesn't mean that it's not real. This is about the same thing basically for bitcoins value.

Just because we are the only ones that give it a value and make it 20k+ doesn't mean that it doesn't have a value, we have a "real" value and that's the price, we decide its value. This is how you should approach it, why? Because for the first time in all of human history, "people" have money, not governments, not nations, not armies, literally just people.