Over the past eight years, people have been trying to price the BTC, offering bubble markers (Several years before the bubble burst at 1000, then $ 2000, then $ 5000). There are those who expect BTC up to $ 500,000 / 1 BTC, everyone has their own reasons, opinions, so what is the real value of the BTC?
The only "real" value of bitcoins is the price that it has now. Someone can have a totally convincing explanation why one bitcoin has to be worth a certain amount of money, but at the end of the day, that's now the price of bitcoin. People aren't going to buy one bitcoin from him at that price just because he was able to explain it well. Even with all the reasonings, bitcoin might still fail to reach the prices people are expecting from bitcoin because the price is affected by a lot of factors.
Some examples are:
1. whales selling their coins,
2. a major country prohibiting the use of bitcoins,
3. a relevant person in the crypto world started a FUD,
4. FUD caused unknowingly by another person's skepticism about bitcoin.
Assuming that one day, all of these hindrances will be overcome by the fact that bitcoin is actually a necessity in the future, the speculations still aren't that accurate. One can claim that "bitcoin will one day cost $500k each" but when? The "when" part is the most important since that will tell you how long do you have to hold your bitcoins.